QUESTION 11 Study the Exhibit below carefully: What is the function of the Frame Relay DLCI with regard to Cisco HighwayA?

A. Defines the signaling standard between Cisco HighwayA and Cisco HighwayB,

B. Identifies the type of encapsulation in operation between Cisco HighwayA and Cisco HighwayB.

C. Identifies the circuit between Cisco HighwayB and the frame switch.

D. Defines the signaling standard between Cisco HighwayA and the frame switch. Answer: C Explanation: Cisco HighwayA sends frames with DLCI, and they reach the local switch. The local switch sees the DLCI field and forwards the frame through the Frame Relay network until it reaches the switch connected to Cisco HighwayB. The Cisco HighwayB's local switch forwards the frame out of the access link to Cisco HighwayB. Reference: CCNA Self-Study CCNA ICND exam certification Guide (Cisco press, ISBN 1-58720-083-X) Page 386

QUESTION 12 What could be the rationale behind using passive-interface command when configuring a router?

A. Allows interfaces to share common IP addresses.

B. Allows an interface to remain up without the aid of keepalives.

C. Allows a router to send routing and not receive updates via that interface.

D. Allows a routing protocol to forward updates that is missing its IP address.

E. Allows a router to receive routing updates on an interface but not send updates via that interface. Answer: E Explanation: The passive-interface command is used to control the advertisement of routing information. The command enables the suppression of routing updates over some interfaces while allowing updates to be exchanged normally over other interfaces. With most routing protocols, the passive-interface command restricts outgoing advertisements only. However, when used with Enhanced Interior Gateway Routing Protocol (EIGRP), the effect is slightly different. This document demonstrates that use of the passive-interface command in EIGRP suppresses the exchange of hello packets between two routers, resulting in the loss of their neighbor relationship. This stops not only routing updates from being advertised, but it also suppresses incoming routing updates. This document also discusses the configuration required in order to allow the suppression of outgoing routing updates, while allowing incoming routing updates to be learnt normally from the neighbor. Reference: http://www.cisco.com/en/US/tech/tk365/tk207/technologies_tech_note09186a0080093f0a.shtml

QUESTION 13 You are a network administrator at Cisco Highway. The Cisco Highway network is illustrated in the following exhibit. Study it carefully:

Cisco Highway is acquiring a new Class C IP network. Which of the following subnet masks will provide one useful subnet for each department while still making allowance for enough usable host addresses per department as specified in the graphic?

A. 255.255.255.128

B. 255.255.255.192

C. 255.255.255.224

D. 255.255.255.240

E. 255.255.255.248

F. 255.255.255.252 Answer: C Explanation: The network currently consists of 5 subnets. We need to subnet the Class C network into at least 5 subnets. This requires that we use 3 bits for the network address. Using the formula 2n-2 we get 6. This also leaves us with 5 bits for hosts, which gives us 30 hosts. Incorrect Answers:

A: Only 1 bit is required to give us 128 but 1 bit gives us 0 subnets.

B: 2 bits are required to give us 192 but 2 bits gives us only 2 subnets. This is too few.

D: 4 bits are required to give us 240. This gives us 14 subnets. However we are left with 4 bits for hosts leaving us with 14 host addresses. Two of the networks require more than 14 hosts so this will not do.

E: 5 bits are required to give us 248. This gives us 30 subnets. However we are left with 3 bits for hosts leaving us with 6 host addresses. All the networks require more than 6 hosts so this will not do.

F: 6 bits are required to give us 252. This gives us 62 subnets. However we are left with 2 bits for hosts leaving us with 2 host addresses. This is too few.

QUESTION 14 You are a network administrator at Cisco Highway. You need to troubleshoot the Cisco Highway network shown in the exhibit. Study the Exhibit carefully:

The host, CK1, is connected to the Cisco Highway1 LAN, but it cannot get access to resources on any of the other networks. The host's configuration is as follows: host address: .....192.168.166.45 subnet mask: ......255.255.255.240 default gateway: ..192.168.166.32 Then which of the following is the cause of the problem?

A. The default gateway is a network address.

B. The default gateway is on a different subnet address as the host.

C. The IP address of the host is on a different subnet.

D. The host subnet mask is incompatible to the subnet mask of the attached router interface. Answer: A Explanation: The range of the subnet used in this question is 192.168.166.32 to 192.168.166.47.192.168.166.32 is the network address and 192.168.166.47 is the broadcast address leaving a usable host address range of 192.168.166.33 to 192.168.166.46. The default gateway for the host should be 192.168.166.33. Incorrect Answers:

B: The default gateway is on the same network but it is a network address.

C: The host address is correct.

D: The subnet mask 255.255.255.240 uses 28 bits and is therefore correct.

QUESTION 15 What are the benefits of using a router to segment the network at a main office? (Select two options.)

A. Broadcasts are not forwarded across the router.

B. Broadcasts are eradicated.

C. Adding a router to the network decreases latency.

D. Filtering can occur based on Layer 3 information.

E. Routers are more efficient than switches. Answer: A, D Explanation Routers do not forward broadcast messages and therefore breaks up a broadcast domain. In addition, routers can be used to filter network information.

QUESTION 16 You are a network technician at Cisco Highway. Cisco Highway has a larger 172.12.0.0 network that you want to divide into subnets. You want each subnet to support 459 hosts. You also want to provide the maximum number of subnets. Which network mask should you use?

A. 255.255.0.0.

B. 255.255.128.0.

C. 255.255.224.0.

D. 255.255.254.0. Answer: D Explanation: To obtain 459 hosts the number of host bits will be 9. This can support a maximum of 510 hosts. To keep 9 bits for hosts means the last bit in the 3rd octet will be 0. This gives 255.255.254.0 as the subnet mask.

QUESTION 17 Your new junior Cisco Highway trainee, Rutger, has a problem with basic binary math. He must convert the binary number 10011101 into its decimal and hexadecimal equivalent. Which two numbers must Rutger provide? (Select two options)

A. 158

B. 0x9D

C. 156

D. 157

E. 0x19 F. 0x9F Answer: B D Explanation: 10011101 = 157 0x9D is ASCII Hexadecimal = 157 Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1818/products_command_reference_
chapter09186a00800 7fc95.html

QUESTION 18 You are a network technician at Cisco Highway. The Cisco Highway network is illustrated in the following exhibit. Study it carefully: Note: SPIDs are not required for this switch. Which of the following command will you use to bring up the ISDN link? (Select three options.)

A. Router(config-if)# encapsulation ppp

B. Router(config)# dialer-list 1 protocol ip allow

C. Router(config)# isdn switch-type type

D. Router(config)# dialer map ip address name connection number

E. Router(config-if)# dialer-group 1

F. Router(config-if)# ip address subnet mask Answer: A E F Explanation:

• Proper encapsulation to be defined on both routers.
• IP address to be assigned for interface with subnet mask
• Dialer group number enables dialer-list on this interface. Dialer-list to be defined on global configuration command. Reference: CCNA Self-Study CCNA ICND exam certification Guide (Cisco press, ISBN 1-58720-083-X) Page 310+337

QUESTION 19 You are a network technician at Cisco Highway. You are troubleshooting a LAN connectivity problem. Which of the following router IOS commands could you use? (Select three options.)

A. show ip route

B. winipcfg

C. tracert

D. show interfaces

E. traceroute

F. ping Answer: A D F Explanation

A: The show ip route command displays the IP route table.

D: The show interfaces EXEC command to display statistics for all interfaces configured on the router or access server.

F: The ping command tests connectivity to a remote node.

QUESTION 20 Place the parameters in the correct sequence to configure dial-on-demand routing (DDR) on an ISDN BRI interface.

Answer: Place 1st - next hop address Place 2nd - Dialer-list Place 3rd - protocol Place 4th - Dialer-String Place 5th - group Reference: CCNA Self-Study CCNA ICND exam certification Guide (Cisco press, ISBN 1-58720-083-X) Page 342