Rabu, 17 November 2010

CCNA Discovery 2 Module 8 Exam Answers Version 4.0

1. Which AAA service reduces IT operating costs by providing detailed reporting and monitoring of network user behavior, and also by keeping a record of every access connection and device configuration change across the network?
• authentication
• accreditation
• accounting
• authorization

2. Which three items are normally included when a log message is generated by a syslog client and forwarded to a syslog server? (Choose three.)
• date and time of message
• ID of sending device

• length of message
• message ID
• checksum field
• community ID

3. What is the advantage of using WPA to secure a wireless network?
• It uses a 128-bit pre-shared hexadecimal key to prevent unauthorized wireless access.
• It uses an advanced encryption key that is never transmitted between host and access point.
• It is supported on older wireless hardware, thus providing maximum compatibility with enterprise equipment.
• It requires the MAC address of a network device that is requesting wireless access to be on a list of approved MAC addresses.

4. A company wants to configure a firewall to monitor all channels of communication and allow only traffic that is part of a known connection. Which firewall configuration should be deployed?
• packet filtering
• proxy
• stateful packet inspection
• stateless packet inspection

5. A server log includes this entry: User student accessed host server ABC using Telnet yesterday for 10 minutes. What type of log entry is this?
• authentication
• authorization
• accounting
• accessing

6. What two measures help to verify that server backups have been reliably completed? (Choose two.)
• reviewing backup logs
• performing trial backups

• performing full backups only
• replacing tape backup with hard disk-based backup
• using an autoloader when backups require more than one tape

7. Which means of communication does an SNMP network agent use to provide a network management station with important but unsolicited information?
• query
• broadcast
• ICMP ping
• trap
• poll

8. Which three protocols are used for in-band management? (Choose three.)
• FTP
• HTTP
• SNMP
• Telnet
• TFTP

• DHCP

9. A hacker has gained access to sensitive network files. In analyzing the attack, it is found that the hacker gained access over a wireless segment of the network. It is further discovered that the only security measure in place on the wireless network is MAC Address Filtering. How is it likely that the hacker gained access to the network?
• The hacker used a software tool to crack the shared hexadecimal wireless key.
• The hacker obtained the MAC address of a permitted host, and cloned it on his wireless laptop NIC.
• The attacker mounted a denial of service attack to overwhelm the firewall before penetrating the wireless LAN.
• The hacker gained wireless access to the MAC address database and added his own MAC address to the list of permitted addresses.

10. A network administrator is assigning network permissions to new groups of users and employing the principle of least privilege. Which two actions should the administrator take? (Choose two.)
• Provide users with only the access to resources required to do their jobs.
• Provide the minimum level of permissions required for users to do their jobs.
• Remove all permissions from the users and grant permissions as they are requested.
• Allow users to decide how much permission they need to accomplish their job tasks.
• Provide full access to the users and gradually remove privileges over time.

11. Which three protocols describe methods that can be used to secure user data for transmission across the internet? (Choose three.)
• SMTP
• IPSEC
• SSL
• HTTPS

• FTP
• TFTP

12. Which benefit does SSH offer over Telnet when remotely managing a router?
• encryption
• TCP usage
• authorization
• connection using six VTY lines

13. Which of the following does SNMP use to hold information collected about the network?
• network management station
• network management database
• management information base
• database information agent

14. What are two potential problems with using tape media to back up server data? (Choose two.)
• Tape is not a cost-effective means of backing up data.
• Data tapes are difficult to store offsite.
• Data tapes are prone to failure and must be replaced often.
• Tape drives require regular cleaning to maintain reliability.
• Backup logs are not available with tape backup solutions.

15. What is the term for the public network between the boundary router and the firewall?
• "clean" LAN
• intranet
• DMZ
• extranet

16. Which two characteristics of network traffic are being monitored if a network technician configures the company firewall to operate as a packet filter? (Choose two.)
• applications
• physical addresses
• packet size
• ports
• protocols


17. When is the use of out-of-band network management necessary?
• when a server needs to be monitored across the network
• when the management interface of a device is not reachable across the network
• when enhanced monitoring features are required to gain an overall view of the entire network
• when it is desirable to use the information that is provided by SNMP

18. What network layer security protocol can secure any application layer protocol used for communication?
• HTTPS
• IMAP
• FTPS
• IPSEC
• TLS

19. Before a technician upgrades a server, it is necessary to back up all data. Which type of backup is necessary to ensure that all data is backed up?
• daily
• differential
• full
• incremental
• partial

20. What AAA component assigns varying levels of rights to users of network resources?
• auditing
• accounting
• authorization
• access control
• authentication
• acknowledgement

CCNA Discovery 2 Module 7 Exam Answers Version 4.0

CCNA Discovery 2 Module 7 Exam Answers Version 4.0
1. Which two statements are true about the OSI and TCP/IP models? (Choose two.)
• The two bottom layers of the TCP/IP model make up the bottom layer of the OSI model.
• The TCP/IP model is a theoretical model and the OSI model is based on actual protocols.
• The OSI network layer is comparable to the Internet layer of the TCP/IP model.
• The TCP/IP model specifies protocols for the physical network interconnection.
• The TCP/IP model is based on four layers and the OSI model is based on seven layers.

2. To meet customer expectations, an ISP must guarantee a level of service that is based on what two factors? (Choose two.)
• accessibility
• adaptability
• availability
• reliability

• scalability

3. User1 is sending an e-mail to User2@cisco.com. What are two characteristics of the process of sending this data? (Choose two.)
• It utilizes TCP port 110.
• A TCP connection is established directly between the User1 and User2 client computers in order to send the e-mail message.
• It utilizes a store and forward process.
• The same application layer protocol is used to send the e-mail and retrieve it from the destination server.
• SMTP is used to send the e-mail message to the mail servers.

4. Refer to the exhibit. Host1 is in the process of setting up a TCP session with Host2. Host1 has sent a SYN message to begin session establishment. What happens next?
• Host1 sends an ACK message to Host2.
• Host1 sends a SYN message to Host2.
• Host1 sends a SYN-ACK message to Host2.
• Host2 sends an ACK message to Host1.
• Host2 sends a SYN message to Host1.
• Host2 sends a SYN-ACK message to Host1.

5. What are three characteristics of network reliability? (Choose three.)
• Redundant hardware provides enhanced reliability.
• Reliability is measured as a percent.
• Reliability is the responsibility of the ISP customers.
• Fault tolerance is a measure of reliability.
• The longer the MTBF, the greater the reliability.


6. Which two statements describe the FTP protocol? (Choose two.)
• It uses well-known port 23.
• The protocol interpreter is responsible for the data transfer function.
• In passive data connections, the FTP client initiates the transfer of data.

• It requires two connections between client and server.
• FTP servers open a well-known port on the client machine.

7. What is the function of the TCP three-way handshake?
• It enables the synchronization of port numbers between source and destination hosts.
• It immediately triggers the retransmission of lost data.
• It synchronizes both ends of a connection by allowing both sides to agree upon initial sequence numbers.
• It identifies the destination application on the receiving host.

8. What are three characteristics of HTTPS? (Choose three.)
• It uses a different client request-server response process than HTTP uses.
• It specifies additional rules for passing data between the application and data link layers.
• It supports authentication.
• It allows more simultaneous connections than HTTP allows.
• It encrypts packets with SSL.
• It requires additional server processing time.


9. Which DNS zone resolves an IP address to a qualified domain name?
• dynamic lookup
• forward lookup
• resolution lookup
• reverse lookup

10.
2
What type of update allows client computers to register and update their resource records with a DNS server whenever changes occur?
• dynamic
• zone transfer
• local recursive query
• root domain query
• top-level domain query

11. Refer to the exhibit. Which two statements are true about this file? (Choose two.)
• If the gateway address changes, the file will be updated dynamically.
• The command ping fileserv will use IP address 172.16.5.10.
• If the ping www.cisco.com command is issued, the file will be checked for the Cisco web server IP address before DNS is queried.
• The file must be created by the user if it is to be used by a workstation.
• Name to IP address mappings are added to the file after they are received from DNS.

12. Which two tasks are the responsibility of the local DNS server? (Choose two.)
• maintaining a large number of cached DNS entries
• maintaining the ISP server
• mapping name-to-IP addresses for internal hosts
• forwarding name resolution requests to a caching-only server

• forwarding all name resolution requests to root servers on the Internet

13. What are three unique characteristics of UDP? (Choose three.)
• connection oriented
• full-duplex operation
• low overhead
• no flow control
• no error-recovery function

• reliable transmission

14. A manufacturing company is looking into subscribing to services from a new ISP. The company requires hosted world wide web, file transfer, and e-mail services. Which three protocols represent the key application services that are required by the company? (Choose three.)
• FTP
• HTTP

• ICMP
• PPP
• Telnet
• SMTP

15. Which two options correctly match protocol and well-known port number? (Choose two.)
• DNS - 25
• FTP - 110
• HTTP - 80
• POP3 - 25
• SMTP - 25

16. Within TCP, what combination makes up a socket pair?
• source port with destination port
• source IP address with destination port
• source IP address and destination IP address
• source IP address and port with a destination IP address and port

17. Which protocol is used to send e-mail, either from a client to a server or from a server to another server?
• SNMP
• FTP
• SMTP
• HTTPS

18. Refer to the exhibit. The PC is requesting HTTP data from the server. What is a valid representation of source and destination sockets for this request?
• Source - 192.168.1.17:80 ; Destination - 192.168.2.39:80
• Source - 192.168.1.17:80 ; Destination - 192.168.2.39:1045
• Source - 192.168.1.17:1045 ; Destination - 192.168.2.39:80
• Source - 192.168.1.17:1045 ; Destination - 192.168.2.39:1061

19. What type of DNS server is typically maintained by an ISP?
• caching-only
• root
• second-level
• top-level

20. A client is communicating with a server on a different segment of the network. How does the server determine what service is being requested by the client?
• The server will apply the default service configured in directory services.
• The server will use ARP to discover the appropriate service from the local router.
• The server will send a request to the client asking for the appropriate service.
• The server will determine the appropriate service from the destination port field.

21.
3
When a host is communicating with multiple applications on the same server at the same time, which of the following will have the same value for each session? (Choose two.)
• IP address
• MAC address

• session number
• sequence number

CCNA Discovery 2 Module 6 Exam Answers Version 4.0

CCNA Discovery 2 Module 6 Exam Answers Version 4.0
1. Which command is used to view the RIP routing protocol settings and configuration?
• show version
• show ip route
• show interface
• show ip protocols

2.
1
Refer to the exhibit. What is the maximum number of RIP routers that could separate HostA and HostB and still leave the hosts with connectivity to each other?
• 14
• 15
• 16
• 17

3. In which situation would a company register for its own autonomous system number (ASN)?
• when the company's ISP adds connection points to the Internet
• when additional routers are added to the corporate internetwork
• when more than one interior routing protocol is used
• when the company uses two or more ISPs

4. Consider this routing table entry
• R 172.16.1.0/24 [120/1] via 200.1.1.1 00:00:27 Serial0/1
• What type of route is this?
• a static route
• a default route
• a RIP route
• an OSPF route
• an EIGRP route
• a directly-connected route

5. What is the difference between interior and exterior routing protocols?
• Exterior routing protocols are only used by large ISPs. Interior routing protocols are used by small ISPs.
• Interior routing protocols are used to route on the Internet. Exterior routing protocols are used inside organizations.
• Exterior routing protocols are used to administer a single autonomous system. Interior routing protocols are used to administer several domains.
• Interior routing protocols are used to communicate within a single autonomous system. Exterior routing protocols are used to communicate between multiple autonomous systems.

6. What information is included in RIPv2 routing updates that is not included in RIPv1 updates?
• metric
• subnet mask
• area identification
• hop count
• autonomous system number

7. Which routing protocol is used to exchange data between two different ISPs?
• BGP
• EIGRP
• OSPF
• RIP v2

8.
2
Refer to the exhibit. Which configuration command or commands contributed to the output that is shown?
• routerA(config-router)# no version 2
• routerA(config)# interface fa0/0
• routerA(config-if)# ip address 172.19.0.0 255.255.0.0
• routerA(config-router)# network 192.168.3.0
• routerA(config)# no ip default-gateway

9.
3
Refer to the exhibit. If all routers are running RIP and network 10.0.0.0 goes down, when will R3 learn that the network is no longer available?
• in 30 seconds
• in 60 seconds
• in 90 seconds
• Immediately

10. What statement is true regarding an AS number?
• AS numbers are controlled and registered for Internet use.
• Interior routing protocols require registered AS numbers.
• ISPs require all customers to have registered AS numbers.
• All routers at an ISP must be assigned the same AS number.

11. What is the purpose of the network command used when configuring RIP?
• to specify whether RIPv1 or RIPv2 will be used as the routing protocol
• to allow the router to monitor RIP updates that occur on other routers
• to identify which networks on the router will send and receive RIP updates
• to configure the IP address on an interface that will use RIP
• to identify all of the remote networks that should be reachable from the router

12. Which command would a network administrator use to determine if the routers in an enterprise have learned about a newly added network?
• router# show ip address
• router# show ip route
• router# show ip networks
• router# show ip interface brief
• router# debug ip protocol
• router# debug rip update

13. What is the purpose of a routing protocol?
• It is used to build and maintain ARP tables.
• It provides a method for segmenting and reassembling data packets.
• It allows an administrator to devise an addressing scheme for the network.
• It allows a router to share information about known networks with other routers.
• It provides a procedure for encoding and decoding data into bits for packet forwarding.

14. What device enables an ISP to connect with other ISPs to transfer data?
• border gateway router
• DSLAM
• web server
• interior router

15. Which command will display RIP routing updates as they are sent and received?
• show ip route
• show ip rip
• debug ip rip
• show ip protocols
• show ip rip database

16. Which part of an IP packet does the router use to make routing decisions?
• source IP address
• source MAC address
• destination IP address
• destination MAC address

17. What two types of businesses would benefit from registering as their own autonomous systems? (Choose two.)
• a home business with one ISP connection
• a global business with connections to multiple local ISPs
• a medium-sized nationwide business with Internet connectivity through different ISPs

• a large enterprise with two connections to the same ISP
• a small ISP with a single Internet connection through a larger ISP

18. Which command will display RIP activity as it occurs on a router?
• debug ip rip
• show ip route
• show ip interface
• show ip protocols
• debug ip rip config
• show ip rip database

19. Why is fast convergence desirable in networks that use dynamic routing protocols?
• Routers will not allow packets to be forwarded until the network has converged.
• Hosts are unable to access their gateway until the network has converged.
• Routers may make incorrect forwarding decisions until the network has converged.
• Routers will not allow configuration changes to be made until the network has converged.

20. Which two statements describe static routes? (Choose two.)
• They are created in interface configuration mode.
• They require manual reconfiguration to accommodate network changes.
• They automatically become the default gateway of the router.
• They are identified in the routing table with the prefix S
• They are automatically updated whenever an interface is reconfigured or shutdown.

21. Which two statements or sets of statements describe differences between link-state and distance vector routing protocols? (Choose two.)
• Link-state routing protocols routinely use more bandwidth for updates than do distance vector routing protocols.
• Distance vector routing protocols update all routers at one time. Link-state routing protocols update one router at a time.
• Link-state routers only know about directly connected routers. Distance vector routers know about every router in the network.
• Link-state routing protocols update when a change is made. A network using distance vector routing protocols only updates at a specific interval.

• Distance vector routing protocols have limited information about the entire network. Link state routing protocols know about all routers in the network.
• In case of similar topologies, networks using link-state routing protocols typically converge more rapidly than do networks using distance vector routing protocols.

22. Which protocol is an exterior routing protocol?
• BGP
• EIGRP
• OSPF
• RIP

23. Hosts on two separate subnets cannot communicate. The network administrator suspects a missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)
• Ping
• show arp
• Traceroute
• show ip route

• show interface
• show cdp neighbor detail

24. What term refers to a group of networks that uses the same internal routing policies and is controlled by a single administrative authority?
• Internet
• intranet
• virtual private network
• autonomous system

Kamis, 11 November 2010

CCNA Discovery 2 Module 5 Exam Answers Version 4.0

1. vIn what two ways does SDM differ from the IOS CLI? (Choose two.)
• SDM is used for in-band management only. The IOS CLI can be used for in-band and out-of-band management.
• SDM is accessed through a Telnet application. The IOS CLI is accessed through a web browser.
• SDM is available for all router platforms. The IOS CLI is available for a limited number of Cisco devices.
• SDM utilizes GUI buttons and text boxes. The IOS CLI requires the use of text-based commands.
• SDM is used for advanced configuration tasks. The IOS CLI is preferred for initial basic device configuration.

2. Which mode will a configured router display at login?
• global configuration mode
• setup mode
• ROM monitor mode
• user EXEC mode

3.

Refer to the exhibit. Which password or passwords will be encrypted as a result of the configuration that is shown?
• virtual terminal only
• enable mode only
• console and virtual terminal only
• enable mode and virtual terminal
• only the service password
• all configured passwords

4.

Refer to the exhibit. Which three sets of commands are required to enable administrators to connect to the Switch1 console over Telnet for configuration and management? (Choose three.)
Switch1(config)# interface fa0/1
Switch1(config-if)# ip address 192.168.2.64 255.255.255.192
• Switch1(config)# interface fa0/1
Switch1(config-if)# ip address 192.168.2.66 255.255.255.192
• Switch1(config)# interface vlan 1
Switch1(config-if)# ip address 192.168.2.126 255.255.255.192
Switch1(config-if)# no shutdown

• Switch1(config)# line vty 0 4
Switch1(config-line)# enable password cisco
Switch1(config-line)# login
• Switch1(config)# line vty 0 15
Switch1(config-line)# password cisco
Switch1(config-line)# login
• Switch1(config)# ip default-gateway 192.168.2.65

5. How does the SYST LED on the catalyst 2960 switch indicate a POST failure?
• blinks rapidly amber
• blinks rapidly green
• steady amber
• steady green

6.

Refer to the exhibit. A company always uses the last valid IP address in a subnetwork as the IP address of the router LAN interface. A network administrator is using a laptop to configure switch X with a default gateway. Assuming that the switch IP address is 192.168.5.147/24, what command will the administrator use to assign a default gateway to the switch?
• X(config)# ip default-gateway 192.168.5.254
• X(config)# ip gateway 192.168.5.1
• X(config)# ip route 0.0.0.0 0.0.0.0 192.168.5.1
• X(config)# ip default-route 192.168.5.1
• X(config)# ip route 192.168.5.254 255.255.255.0 fastethernet 0/0

7. A technician has made changes to the configuration of a router. What command will allow the technician to view the current configuration before he saves the changes?
• router# show running-config
• router# show startup-config
• router# show flash
• router# show version

8. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)
• VTY interface
• console interface

• Ethernet interface
• secret EXEC mode
• privileged EXEC mode
• router configuration mode

9. To save time, IOS commands may be partially entered and then completed by typing which key or key combination?
• Tab
• Ctrl-P
• Ctrl-N
• Up Arrow
• Right Arrow
• Down Arrow

10. What is the correct command sequence to configure a router host name to 'LAB_A'?
• Router> enable
Router# configure terminal
Router(config)# hostname LAB_A

• Router> enable
Router# hostname LAB_A
• Router> enable
Router# configure router
Router(config)# hostname LAB_A
• Router> enable
Router(config)# host name LAB_A

11.

Refer to the exhibit. From the router console, an administrator is unable to ping a Catalyst switch that is located in another building. What can the administrator do from her location to check the IP configuration of the attached switch? 

• Open an SDM session with the switch from her desktop.
• Telnet to the switch from the router console.
• Use the show cdp neighbors detail command from the router console.
• The administrator must go to the switch location and make a console connection to check these settings.

12. Which two options must be selected in SDM Express to enable a router serial interface to obtain an IP address automatically? (Choose two.)
• Easy IP (IP negotiated)
• IP unnumbered
• No IP address
• HDLC encapsulation
• Frame Relay encapsulation
• PPP encapsulation

13. What three settings can be made in the SDM Express basic configuration screen? (Choose three.)
• host name
• DHCP options
• domain name
• interface IP addresses
• enable secret password
• DNS server IP addresses

14. Which tasks can be accomplished by using the command history feature? (Choose two.)
• View a list of commands entered in a previous session.
• Recall up to 15 command lines by default.
• Set the command history buffer size.
• Recall previously entered commands.

• Save command lines in a log file for future reference.

15. What option within Cisco SDM Express must be configured to allow hosts that receive IP address settings from the router to resolve names on the network or Internet?
• host name
• domain name
• DHCP address pool
• DNS server IP address

16. Which three encapsulation types can be set on a serial interface by an administrator who is using SDM Express? (Choose three.)
• ATM
• CHAP
• Frame Relay
• HDLC
• PAP
• PPP

17. Which command will display routing table information about all known networks and subnetworks?
• Router# show ip interfaces
• Router# show ip connections
• Router# show ip route
• Router# show ip networks

18. A network administrator needs to configure a router. Which of the following connection methods requires network functionality to be accessible?
• console
• AUX
• Telnet
• modem

19. Which three pieces of information about a neighbor device can be obtained by the show cdp neighbors command? (Choose three.)
• platform
• routing protocol
• connected interface of neighbor device
• device ID

• IP addresses of all interfaces
• enable mode password

20.

Which function is a unique responsibility of the DCE devices shown in the exhibit?
• transmission of data
• reception of data
• clocking for the synchronous link
• noise cancellation in transmitted data

21. Which of the following are functions of NVRAM? (Choose two.)
• stores the routing table
• retains contents when power is removed
• stores the startup configuration file

• contains the running configuration file
• stores the ARP table

22.

Refer to the exhibit. Which series of commands will enable users who are attached to Router1 to access the remote server?
• Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.129 255.255.255.252
Router1(config-if)# clock rate 64000
Router1(config-if)# no shutdown
• Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.125 255.255.255.252
Router1(config-if)# no shutdown
• Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.125 255.255.255.252
Router1(config-if)# clock rate 64000
Router1(config-if)# no shutdown
• Router1(config)# interface S0/0/0
Router1(config-if)# ip address 64.100.0.129 255.255.255.252
Router1(config-if)# no shutdown


23. A network technician is attempting to add an older workstation to a Cisco switched LAN. The technician has manually configured the workstation to full-duplex mode in order to enhance the network performance of the workstation. However, when the device is attached to the network, performance degrades and excess collision are detected. What is the cause of this problem?
• The host is configured in a different subnet from the subnet of the switch.
• There is a duplex mismatch between the workstation and switch port.
• The switch port is running at a different speed from the speed of the workstation NIC.
• The host has been configured with a default gateway that is different from that of the switch.

24. Which of the following statements are true regarding the user EXEC mode? (Choose two.)
• All router commands are available.
• Global configuration mode can be accessed by entering the enable command.
• A password can be entered to allow access to other modes.
• Interfaces and routing protocols can be configured.
• Only some aspects of the router configuration can be viewed.

25. Which command turns on a router interface?
• Router(config-if)# enable
• Router(config-if)# no down
• Router(config-if)# s0 active
• Router(config-if)# interface up
• Router(config-if)# no shutdown

CCNA Discovery 2 Module 4 Exam Answers Version 4.0

1. In an 8 bit binary number, what is the total number of combinations of the eight bits?
• 128
• 254
• 255
• 256
• 512
• 1024

2. Convert the decimal number 231 into its binary equivalent. Select the correct answer from the list below.
• 11110010
• 11011011
• 11110110
• 11100111
• 11100101
• 11101110
3. How many usable hosts are available given a Class C IP address with the default subnet mask?
• 254
• 255
• 256
• 510
• 511
• 512

4. Which statement describes NAT overload or PAT?
• Each internal address is dynamically translated to an individual external IP address.
• A single internal address is always translated to the same unique external IP address.
• Many internal addresses can be translated to a single IP address using different port assignments.
• Many internal addresses are statically assigned a single IP address and port to use for communications.

5. Which IPv4 class of addresses provides the most networks?
• Class A
• Class B
• Class C
• Class D
• Class E

6. Which statement accurately describes public IP addresses?
• Public addresses cannot be used within a private network.
• Public IP addresses must be unique across the entire Internet.
• Public addresses can be duplicated only within a local network.
• Public IP addresses are only required to be unique within the local network.
• Network administrators are free to select any public addresses to use for network devices that access the Internet.

7. Which two statements describe classful IP addresses? (Choose two.)
• It is possible to determine which class an address belongs to by reading the first bit.
• The number of bits used to identify the hosts is fixed by the class of the network.
• Only Class A addresses can be represented by high-order bits 100.
• Up to 24 bits can make up the host portion of a Class C address.
• Up to 24 bits can be used to identify unique networks.
• Three of the five classes of addresses are reserved for multicasts and experimental use.

8. Company XYZ uses a network address of 192.168.4.0. It uses the mask of 255.255.255.224 to create subnets. What is the maximum number of usable hosts in each subnet?
• 6
• 14
• 30
• 62

9. hat is the network broadcast address for a Class C address of 192.168.32.0 with the default subnet mask?
• 192.168.0.0
• 192.168.0.255
• 192.168.32.0
• 192.168.32.254
• 192.168.32.255

10.  Refer to the exhibit. Host A is connected to the LAN, but it cannot get access to any resources on the Internet. The configuration of the host is shown in the exhibit. What could be the cause of the problem?
• The host subnet mask is incorrect.
• The default gateway is a network address.
• The default gateway is a broadcast address.
• The default gateway is on a different subnet from the host.


11. IPv6 increases the IP address size from 32 bits to how many bits?
• 64
• 96
• 128
• 192
• 256
• 512

12. What is the range of the first octet in a Class B address?
• 127 to 191
• 127 to 192
• 128 to 191
• 128 to 192

13. Which IPv4 class provides the highest number of host addresses per network?
• Class A
• Class B
• Class C
• Class D
• Class E

14. refer to the exhibit. Which range of IP addresses would allow hosts that are connected to the Router1 Fa0/0 interface to access outside networks?
• 192.168.1.0 through 192.168.1.95
• 192.168.1.66 through 192.168.1.94
• 192.168.1.66 through 192.168.1.96
• 192.168.1.0 through 192.168.1.127
• 192.168.1.66 through 192.168.1.128

15. Which option shows the proper notation for an IPv6 address?
• 2001,0db8,3c55,0015,abcd,ff13
• 2001-0db8-3c55-0015-abcd-ff13
• 2001.0db8.3c55.0015.abcd.ff13
• 2001:0db8:3c55:0015::abcd:ff13 

16. What are two reasons that NAT was developed? (Choose two.)
• to preserve registered public IP addresses
• to allow users on the public Internet to access local networks
• to provide a method for privately addressed LANs to participate in the Internet
• to make routing protocols operate more efficiently
• to allow private addresses to be routed on the public Internet
• to reduce overhead and CPU usage on gateway routers

17. What must happen for a privately addressed host on an inside local network to be able to communicate with an outside destination host on the Internet?
• The host IP address must be translated to an outside private address.
• The host IP address must be translated to an inside local address.
• The host IP address must be translated to an outside local address.
• The host IP address must be translated to an inside global address
.

18. Which port numbers are used by PAT to create unique global addresses?
• 255 and below
• 1024 and below
• 1025 and above

• 64,000 and above

19. Static NAT works by mapping a specific inside local IP address to what other specific address type?
• inside global

• outside local
• outside global
• private IP address

20. What are three advantages of NAT implementations? (Choose three.)
• improved security
• improved router performance
• decreased processor load
• improved scalability
• universal application compatibility
• sharing few public IP addresses with many hosts

Rabu, 10 November 2010

Lab 3.2.4.2 Mengevaluasi Rencana Upgrade Pengkabelan

Tujuan
• Memeriksa denah ada pelanggan.
• Mengusulkan rencana kabel upgrade untuk mengakomodasi ruang lantai tambahan.
Latar Belakang / PersiapanSebuah perusahaan menengah memiliki ruang yang ada di lantai dua sebuah menara kantor dan baru saja memperoleh sisa lantai dua. Mereka menanyakan anda untuk memeriksa rencana denah yang ada mereka dan membantu mereka dalam penempatan penempatan baru IDF, kabel untuk mendukung semua ruang kantor baru, dan untuk membantu menentukan apakah semua perangkat yang baru diperlukan.Laboratorium ini dapat dilakukan secara individu maupun kelompok.
Sumber berikut diperlukan:
• Rencana Lantai ada (disediakan)
Langkah 1:
Memeriksa rencana lantai yang ada.
a. Dari informasi yang diberikan mengenai rencana lantai yang ada, label item berikut:
1) POP – Point of Presence
2) MDF – Fasilitas Distribusi Utama
3) IDF – Fasilitas Distribusi Intermediate
4) Vertikal / Backbone pengkabelan
5) Kabel horisontal
b. Apa jenis pemasangan kabel dapat digunakan untuk pemasangan kabel / tulang punggung vertikal? Jelaskan jawaban Anda.
(fiber Optic)
Langkah 2:
Rencana Evaluasi untuk ruang lantai baru.AnyCompany baru saja bergabung dengan sebuah kelompok desain web kecil dan telah mendapatkan ruang yang tersisa di lantai dua untuk mengakomodasi tim desain web. Ruang baru ini diwakili pada diagram sebagai ruang lantai disorot pada sisi kanan floorplan tersebut. Telah diputuskan untuk menambahkan IDF kedua untuk mendukung workstation di daerah baru.a. Sarankan lokasi yang mungkin untuk IDF baru.
a. Apa ruangan / lokasi yang Anda pilih dan menjelaskan mengapa Anda pikir itu cocok?
b. Apa jenis kabel yang akan Anda sarankan untuk pemasangan kabel vertikal yang diperlukan untuk menghubungkan IDF baru ke MDF ada? Jelaskan alasan Anda.
c. Ruang yang baru berisi kebanyakan kantor. Asumsikan bahwa kantor masing-masing akan ditetapkan dengan 2 tetes data. Juga rencana untuk 2 tetes di auditorium untuk mendukung akses Internet untuk presentasi dan sesi pelatihan. Berapa banyak tetes data tambahan perlu dipesan?
d. Anda telah diminta untuk menentukan jumlah baru 24 port switch yang diperlukan untuk IDF baru. Jangan lupa untuk merencanakan pertumbuhan sekitar 25%. Berapa banyak switch baru AnyCompany perlu membeli?
e. Berapa banyak kabel horizontal akan berakhir pada panel patch di IDF yang baru?
 
Langkah 3:
Periksa ruang lantai dan rencana kabel.
a. Apa tetap selain switch yang Anda harapkan untuk temukan di IDF yang baru?
b. Apa tetap selain switch yang Anda harapkan untuk temukan di MDF?
c. Menggunakan kabel yang ada berjalan, bisa Anda gunakan UTP untuk menghubungkan perangkat di kamar 2,20 atau 2,30 langsung ke switch di MDF?
 
Langkah 4. Refleksi
Dengan satu atau dua teman sekelas, diskusikan hal berikut:
a. Apakah lebih baik memiliki IDF dalam ruang lantai atau harus perusahaan menjalankan kabel horizontal untuk setiap perangkat langsung kembali ke MDF ada?
b. Berapa banyak akan diperlukan kabel dari MDF ke IDF untuk mendukung switch? Jelaskan jawaban Anda.
GAMBAR PENDUKUNG:
kesimpulan dari pertanyaan:
atau lab actifity diatas:
* MDF (Main Distribution Frame) : adalah sebuah tempat terminasi kabel yang menghubungkan kabel saluran pelanggan dari sentral telepon dan jaringan kable yang menuju ke terminal pelanggan. Bila sebuah sentral telepon memiliki 1000 pelanggan, maka pada MDF-nya akan terdapat 1000 pasang kabel tembaga yang terpasang pada slot MDF-nya, dimana setiap pasang kabel tembaga ini akan mewakili satu nomor pelanggan. Dan 1000 pasang kabel yeng terpasang di slot MDF ini akan di-cross coneect dengan 1000 pasang kable lain yang berasal dari saluran pelanggan yang menuju ke pesawat terminal pelanggan. Jadi bila seorang pelanggan ingin agar nomor teleponnya diganti dengan nomor lain, maka proses perubahan nomor ini dapat dengan mudah dilakukan dengan merubah koneksi saluran pelanggan di MDF-nya. MDF bisanya diletakan pada satu gedung yang sama dengan sentral teleponnya (berdekatand engansentral telepon).
Jaringan dibagi
Berhasil umum jaringan data center dapat dibagi menjadi sebagai berikut:
1, pusat data manajemen perusahaan jaringan kantor
Jaringan untuk pengelolaan hari ke kantor perusahaan hari dan digunakan untuk menyediakan platform internet akses jaringan, melalui jaringan virtual untuk mencapai pembagian pembatasan koneksi internet.
2, perusahaan manajemen jaringan demonstrasi uji
Manajemen jaringan perusahaan untuk menampilkan web hosting layanan demo platform, perusahaan manajemen jaringan jaringan kantor setiap hari dengan setiap isolasi fisik lainnya, sementara beberapa bidang manajemen bisnis jaringan sebagai kawasan pengembangan uji.
3, host jaringan pelanggan kantor
Jaringan dikelola Layanan ini menyediakan pelanggan dengan kantor leasing dan akses Internet untuk penggunaan sehari-hari untuk menyediakan platform jaringan, dibagi dengan jaringan virtual untuk mencapai isolasi pengguna perusahaan yang berbeda.
Sementara beberapa memiliki persyaratan khusus Hu Ke, independen dari antarmuka outreach.
4, host jaringan pelanggan produksi
Proyek berbasis web, jaringan yang paling penting, dapat dibagi menjadi dua kasus untuk dipertimbangkan:
1) Pengelolaan pelanggan outreach dipinjam garis dan garis kabel internal.
Pengkabelan menggunakan MDA — — EDA HDA kabel data center, sesuai dengan tata letak rak kamar mesin menyiapkan jaringan kabinet pertama, diletakkan oleh jaringan serat multimode kamar mesin dan jaringan Gigabit tembaga untuk melawan yang pertama, dan kemudian diletakkan di bawah kebutuhan spesifiktembaga dan kabel serat optik untuk kabinet EDA.
2) Pelanggan outreach garis bangunan independen, untuk meminjam garis kabel internal.
Beberapa pelanggan mungkin meminta Unicom eksternal yang independen, dan dapat mempertimbangkan setiap kamar sejumlah serat single-mode instalasi kabel optik dan kabel koaksial.
Ke dalam setiap kamar jembatan adalah menyisihkan marjin tertentu, untuk memenuhi kebutuhan pelanggan yang berbeda, dan jembatan daerah seharusnya mampu mempertahankan posisi.
5, pengembangan dan pengujian web hosting pelanggan
Jaringan terutama menyediakan jaringan dan sistem dikelola lokasi pengujian host, jaringan yang terkait dengan jaringan lain pada prinsipnya, dan sebuah bangunan terpisah untuk setiap nasabah.
Pemasangan kabel antara perangkat dan lemah set
Set kabel terintegrasi antara ruang peralatan dan yang lemah, termasuk: Penggunaan Kamar
Telekomunikasi operator ke ruang akses kawat kabel; (untuk kedua arah dari saluran akses)
Lemah antar-lantai MDF IDF Komunikasi operator ruang akses / DC peralatan jaringan akses ruang komunikasi operator jaringan pusat komputer dan ruang (MDF) lantai kantor Dikelola pengguna mempertimbangkan dikelola klien jaringan kantor IDF IDF Pemasangan kabel perencanaan awal
Pusat data total empat unit jaringan komunikasi akses, akses ke sumber daya dari semua akses ruang komunikasi operator ke ruang tandem jaringan (jaringan ruang mesin) manajemen terpadu dan distribusi.
Untuk pengguna biasa dikelola sesuai dengan luas lantai ruangan perencanaan routing daerah, setiap konfigurasi jaringan meja pertama.
Untuk pengguna hosting Kamar VIP lantai kamar, masing-masing kolom rak konfigurasi jaringan meja pertama.
Jaringan tandem kamar ke kamar lantai bagasi kabel meletakkan di antara lemah dan tembaga, dan kemudian melompat dari antar lemah-terhubung ke semua pelanggan dikelola jaringan counter ruang pertama, konfigurasi spesifik jumlah cahaya tembaga luas lantai bawah dan daerah untuk menentukan.
Manajemen kantor staf dan pelanggan dapat berbagi set OA dikelola jaringan kantor, jaringan dapat terhubung dengan Internet.
Pelanggan kantor setiap stasiun kantor informasi umum dapat dikonfigurasi empat poin (tiga data, satu suara), salah satu data titik sebagai jaringan informasi OA poin kantor, sebuah titik data sebagai titik pelanggan informasi manajemen perangkat daerah ruangan, Anda dapatmenerima serangkaian ruang tari sederhana, satu titik data sebagai cadangan.

LAB 1.2.3 MAPPING ISP CONNECTIVITY USING TRACEROUTE

Tujuan
• Jalankan utilitas Windows tracert dari komputer host lokal untuk sebuah website di benua yang berbeda
• Interpretasikan output traceroute untuk menentukan ISP paket melewati perjalanan mereka ari host lokal ke situs tujuan.
• Gambarkan diagram jalur traceroute, yang menunjukkan router dan ISP awan melewati dari host lokal ke website tujuan, termasuk alamat IP untuk setiap perangkat.Latar Belakang / PersiapanDalam kegiatan ini, Anda akan menggunakan utilitas tracert Windows untuk konektivitas internet peta antara Anda ISP lokal dan ISP lain yang digunakan untuk menyediakan akses internet global. Anda juga akan konektivitas peta utama internet berikut Daerah Registries (RIR). Namun, instruktur Anda dapat memilih situs tujuan yang berbeda.
• AfriNIC (African Network Information Centre) – Wilayah Afrika
• APNIC (Asia Pacific Network Information Centre) – Asia / Pasifik
• ARIN (American Registry untuk Internet Numbers) – Wilayah Amerika Utara
• LACNIC (regional Amerika Latin dan Karibia IP Address Registry) – Amerika Latin dan beberapa Kepulauan Karibia
• RIPE NCC (Réseaux IP Européens) – Eropa, Timur Tengah, dan Asia TengahKegiatan ini dapat dilakukan secara individual, berpasangan, atau dalam tim. Hal ini dapat dilakukan sebagai suatu kegiatan di kelas atau sebagai pekerjaan rumah, tergantung pada apakah kelas komputer memiliki akses ke Internet
.
Sumber berikut diperlukan:
• Host komputer dengan sistem operasi Windows
• Akses ke command prompt• Koneksi internet
• Rute menelusuri lembar kerja untuk setiap URL tujuan. worksheet melekat ke laboratorium ini. Setiap siswa menyelesaikan lembar kerja mereka sendiri dan memberikannya ke instruktur.
• Global Konektivitas Peta, yang melekat pada akhir laboratorium ini
• Akses ke prompt perintah PC
 
Langkah 1: Jalankan utilitas tracert dari komputer host
a. Pastikan bahwa komputer host memiliki koneksi ke Internet.
b. Buka jendela Command Prompt dengan mengklik Start> Run dan ketik cmd.Atau, Anda bisa mengklik Start> All Program> Accessories> Command Prompt.
c. Pada tracert, prompt ketik dan website tujuan pertama Anda. output akan terlihat seperti berikut:
d. Simpan output tracert dalam sebuah file teks sebagai berikut:
1) Klik kanan title bar dari jendela Command Prompt dan pilih Edit> Select All.
2) Klik kanan title bar dari jendela Command Prompt lagi dan pilih Edit> Salin.
3) Buka program Windows Notepad: Start> All Programs> Accessories> Notepad
4) Untuk menyisipkan output ke Notepad, pilih Edit> Paste.
5) Pilih File> Save As dan menyimpan file Notepad ke desktop Anda sebagai tracert1.txt.
 
e. Jalankan tracert untuk setiap situs tujuan dan menyimpan output dalam file berurutan nomor.f. Jalankan tracert dari jaringan komputer yang berbeda, misalnya, dari perpustakaan umum atau dari komputer seorang teman yang mengakses Internet menggunakan ISP yang berbeda (untuk instan kabel bukannya DSL). Simpan salinan output yang di Notepad dan mencetaknya untuk referensi di kemudian hari.
 
Langkah 2: output tracert Menafsirkan untuk menentukan konektivitas ISPRute ditelusuri akan melalui banyak hop dan beberapa ISP yang berbeda tergantung pada ukuran dari ISP dan lokasi sumber dan host tujuan. Pada contoh output ditunjukkan di bawah ini, paket tracert perjalanan dari PC sumber ke default gateway lokal router ke ISP Point of Presence (POP) router dan kemudian ke Internet Exchange Point (IXP). Dari sana mereka melewati dua Tier 2 router ISP dan kemudian meski beberapa router Tier 1 ISP saat bergerak melintasi tulang punggung Internet. Ketika mereka meninggalkan Tier 1 backbone ISP, mereka bergerak melalui lain Tier 2 ISP dalam perjalanan ke server tujuan di www.ripe.net.
 
a. Buka file output pertama traceroute dan menjawab pertanyaan-pertanyaan berikut.1) Apa adalah alamat IP dari router lokal POP Anda?(64.180.160.254)________________________________________________________________________
2) Berapa banyak hop traceroute melakukan paket diambil selama perjalanan dari komputer host ke tujuan? ____(13 hop)________________________________________________________________
3) Berapa banyak yang ISP yang berbeda paket traceroute melewati perjalanan dari komputer host ke tujuan? _________(3 perbedaan)_____________________________________________________
4) Daftar alamat IP dan URL dari semua perangkat di output traceroute dalam urutan seperti yang terlihat pada lembar kerja Rute dilacak.
5) Pada kolom Pemilik Jaringan worksheet, mengidentifikasi ISP memiliki setiap router. Jika router milik LAN Anda, menulis “LAN”. Dua yang terakhir bagian dari URL menunjukkan nama ISP. Sebagai contoh, sebuah router yang memiliki “sprint.net” dalam URL-nya milik jaringan ISP yang disebut Sprint.
6) Apakah lulus traceroute melalui router yang tidak teridentifikasi antara dua ISP? Ini mungkin merupakan IXP. Jalankan perintah whois utilitas atau fungsi whois program traceroute visual untuk mengidentifikasi kepemilikan router itu. Atau, buka http://www.arin.net/whois untuk menentukan kepada siapa IP yang ditetapkan.b. Lengkapi lembar kerja menggunakan file output traceroute untuk setiap URL tujuan lain.c. Bandingkan hasil anda dari file output yang berbeda traceroute.Apakah Anda ISP terhubung ke ISP yang berbeda untuk mencapai tujuan yang berbeda?______________________________________(tidak)____________________________________
d. Jika anda telah menjalankan traceroute dari jaringan komputer yang berbeda, periksa output untuk file traceroute juga. Apakah jumlah hop yang berbeda untuk mencapai tujuan yang sama dari ISP lokal yang berbeda? ISP yang mampu mencapai tujuan dalam sedikit hop?___________________________________(tidak), ISP tujuan (destination of ISP network)______________
 
Langkah 3:
Peta konektivitas dari ISPa. Untuk setiap output traceroute, menggambar diagram pada selembar kertas terpisah menunjukkan bagaimana Anda ISP lokal interkoneksi dengan ISP lain untuk mencapai URL tujuan, sebagai berikut:
1) Tampilkan semua perangkat secara berurutan dari router LAN ke server situs tujuan. Label semua perangkat dengan alamat IP mereka.
2) Gambarkan kotak sekitar router POP lokal yang Anda identifikasi, dan label kotak “POP”.
3) Gambar sebuah awan ISP di semua router yang memiliki satu sama ISP, dan label awan dengan nama ISP.
4) a.Gambarkan kotak sekitar setiap router IXP yang Anda identifikasi, dan label kotak “IXP”.
b. Gunakan Global Konektivitas Peta untuk membuat gambar gabungan hanya menampilkan awan ISP dan kotak IXP.

Kamis, 04 November 2010

CCNA Discovery 2 Module 3 Exam Answers Version 4.0

1. Which two benefits can be gained by locating network equipment in a telecommunications closet, rather than in a user area? (Choose two.)
• faster communication speeds
• improved physical security
• more resistant to hacker attempts
• centralized cable management
• less electrical usage

2. Which three issues should be noted on the technician's site survey report? (Choose three.)
• unlabeled cables
• only two power outlets per wall in each room
• poor physical security of network devices
• horizontal cabling runs under 100 meters
• lack of UPS for critical devices
• two users sharing the same computer

3. Which two types of cable are used for initial router configuration? (Choose two.)
• serial cable
• rollover cable
• straight-through cable
• crossover cable
• patch cable
• console cable

4. In addition to the inventory sheet, what other information about the hosts and networking equipment should be documented by the on-site technician while performing the site survey?
• any obsolete office equipment being stored
• all product keys for site license software
• any planned growth anticipated in the near future
• the memory requirements for installed application software

5.

Refer to the exhibit. What type of device is used to connect two networks?
• hub
• router
• switch
• access point

6. It is said that the goal for availability of a communications system is "five-9s". What is meant by this?
• A down time of .00001% is unacceptable.
• A network needs to be available 99.999% of the time.
• Five percent of all network expense covers 99% of user requirements.
• The most critical time for network availability is from 9:00 to 5:00 p.m. five days a week.
• The best time to do maintenance on a network is from 5:00 p.m. to 9:00 a.m. five days a week.

7. What three things are included in a logical topology document? (Choose three.)
• the location of cables, computers, and other peripherals
• the path that the data takes through a network
• the wireless signal coverage area
• the wiring closet and access point locations
• the device names and Layer 3 addressing information
• the location of routing, network address translation, and firewall filtering

8. Which device has the ability to break up broadcast and collision domains?
• repeater
• hub
• router
• switch

9. Why is it important to review the results of an on-site survey report with the customer before beginning the network design?
• to inform the customer of how much time the upgrade will take
• to discuss the implementation schedule for the new equipment
to verify that the report accurately describes the current network and any plans for expansion
• to layout the new network design and discuss possible equipment upgrades and replacements

10. A client requires a networking device that is capable of expansion to suit growing network demands. What type of device will suit this requirement?
• a networking device with ports that can be activated and deactivated
• a networking device with a modular physical configuration
• a networking device with the ability to be turned off remotely
• a networking device with a cost per port that is as high as possible

11. What does the use of redundant network components supply to a network?
• scalability
• manageability
• compatibility
• reliability

12. What is the benefit for a company to use an ISR router?
• An ISR provides the functionality of a switch, router, and firewall in one device.
• ISRs use a PC operating system for routing traffic, thus simplifying configuration and management.
• An ISR is immune to security attacks by hackers and so replaces all other network security measures.
• ISRs make routing decisions at OSI Layer 7, thus providing more intelligence to the network than do other routers.

13. Which three items are typically found in an MDF? (Choose three.)
• user workstations
• switches and routers
• fax machines
• network equipment racks
• the point of presence
• copier

14. What are two advantages of having ISP-managed services? (Choose two.)
• does not require leasing costs for service
• can guarantee up to 99.999% availability
• eliminates the need for data backup
• increases availability of help desk services
• does not require a Service Level Agreement

15. A manufacturing company is in the process of a network upgrade. Which two statements are true about the phases of the upgrade process? (Choose two.)
• Phase 1 is used to determine network requirements.
• Phase 2 includes creating an analysis report.
• Phase 3 is based on an implementation schedule that allows extra time for unexpected events.
• Phase 4 is where prototypes are created and tested.
• Phase 5 includes identifying and addressing any weaknesses in the design.

16. When designing a network upgrade, which two tasks should the onsite technician perform? (Choose two.)
• configure the servers and routers prior to delivery
• upgrade the network operating system and all client operating systems
• investigate and document the physical layout of the premises
• document the final design for approval by the customer
• perform a site survey to document the existing network structure

17. What is the term for the location at the customer premise where the customer network physically connects to the Internet through a telecommunications service provider?
• backbone area
• point of presence
• network distribution facility
• intermediate distribution frame

18.
2
to the exhibit. Which type of twisted pair cable is used between each device?
• A=console, B=straight, C=crossover, D= crossover, E=straight
• A=straight, B=straight, C=straight, D=crossover, E=console
• A=crossover, B=straight, C=straight, D=crossover, E=crossover
• A=console, B=straight, C=straight, D=crossover, E=crossover
• A=console, B=crossover, C=crossover, D=straight, E=straight

19. In what two ways will entering into a managed service agreement with an ISP for a network upgrade affect the costs that are incurred by the customer? (Choose two.)
• Customer IT training costs will increase to enable operation of the new equipment.
• The cost of hardware repairs and support will become the responsibility of the customer.
• Network upgrade and maintenance costs will become predictable.
• Staffing costs will increase because the customer will need to hire additional IT staff to complete the upgrade.
• The company will not need to spend a large amount of money to purchase the equipment upfront.

20. Which type of cable has a solid copper core with several protective layers including PVC, braided wire shielding, and a plastic covering?
• STP
• UTP
• coaxial
• fiber optic

21. What must be added when a network expands beyond the coverage area of the current telecommunications room?
• MDF
• POP
• IDF
• IXP