QUESTION 111:
You are implementing a new frame relay network to provide connectivity between you offices. To do this, you set up the frame relay network using point-to-point subinterfaces.
Which of the following does NOT need to be configured?
A. The Frame Relay encapsulation on the physical interface.
B. The local DLCI on each subinterface.
C. An IP address on the physical interface.
D. The subinterface type as point-to-point.
Explanation:
When using point to point subinterfaces in a frame relay network, the subinterfaces will each have their own IP addresses and will each be contained within their own IP subnet.
The physical interface does not require an IP address.
Incorrect Answers:
A. The physical interface will need to be configured with a layer two encapsulation type, so in this case it must be frame relay.
B. The subinterfaces will have the local DLCI assigned to each one, using the "frame-relay interface-dlci" command for each of the subinterfaces.
D. Each subinterface should be configured as a point to point network type.
QUESTION 112:
After the router interfaces shown in the diagram have been configured, it is discovered that hosts in the Branch LAN cannot access the Internet.
Further testing reveals additional connectivity issues.
What will fix this problem?
A. Change the address of the Branch router LAN interface.
B. Change the address of the Branch router WAN interface.
C. Change the subnet mask of the HQ router LAN interface.
D. Change the address of the HQ router LAN interface.
E. Change the address of the HQ router interface to the Internet.
F. Change the subnet mask of the HQ router interface to the Internet.
Explanation:
The serial line connection between the Branch office and the HG office should have interfaces that belong in the same subnet. Based on the diagram above, the WAN interface of the Branch router is configured with an IP address that is in a different IP network than the serial interface of the HG router. As it is set up currently, no traffic will pass from the Branch router to the HG until these two interfaces are in the same subnet.
QUESTION 113:
A portion of he Certkiller network is shown in the diagram below:
Consider the 192.1.1.0/24 network in this exhibit. This network uses RIP v2.
Which combination of subnetwork assignments will satisfy the requirements for networks A, B, and C of this design? (Select three)
A. Network A = 192.1.1.128/25
B. Network A = 192.1.1.0/25
C. Network B = 192.1.1.252/30
D. Network B = 192.1.1.4/30
E. Network C = 192.1.1.64/26
F. Network C = 192.1.1.224/27
Explanation:
To properly answer this question, it is best to start from the end, which is network C.
Since network C requires at least 55 host addresses, a /26 network must be used. A network mask of /26 will provide for 62 usable IP addresses while a /27 network will only provide for 30 so we must choose E. With choice E taken, hosts within the range of 192.1.1.65-192.1.1.126 will be used.
For network A, both choices A and B are using the correct subnet mask, but we are only limited to choice A since many of the hosts in choice B are already being used in network C. Finally, for network B we are left with choice D since hosts in choice C are already being used by network A.
QUESTION 114:
Assume that RIP v1 is the only routing protocol in use. What is the Maximum number of usable IP address that can be supported on each LAN if the Certkiller network is using one Class C address block?
A. 14
B. 16
C. 30
D. 32
E. 62
F. 64
Explanation:
RIP version 1 does not support VLSM information, so all networks must have the same subnet mask. In the network above, there are a total of 12 networks (6 LANs and 6 different point to point WAN connections). Therefore, if each of the 12 networks use the 255.255.255.240 subnet mask, there will be a total of 16 networks with 14 usable hosts on each LAN.
Incorrect Answers:
You are implementing a new frame relay network to provide connectivity between you offices. To do this, you set up the frame relay network using point-to-point subinterfaces.
Which of the following does NOT need to be configured?
A. The Frame Relay encapsulation on the physical interface.
B. The local DLCI on each subinterface.
C. An IP address on the physical interface.
D. The subinterface type as point-to-point.
Explanation:
When using point to point subinterfaces in a frame relay network, the subinterfaces will each have their own IP addresses and will each be contained within their own IP subnet.
The physical interface does not require an IP address.
Incorrect Answers:
A. The physical interface will need to be configured with a layer two encapsulation type, so in this case it must be frame relay.
B. The subinterfaces will have the local DLCI assigned to each one, using the "frame-relay interface-dlci" command for each of the subinterfaces.
D. Each subinterface should be configured as a point to point network type.
QUESTION 112:
After the router interfaces shown in the diagram have been configured, it is discovered that hosts in the Branch LAN cannot access the Internet.
Further testing reveals additional connectivity issues.
What will fix this problem?
A. Change the address of the Branch router LAN interface.
B. Change the address of the Branch router WAN interface.
C. Change the subnet mask of the HQ router LAN interface.
D. Change the address of the HQ router LAN interface.
E. Change the address of the HQ router interface to the Internet.
F. Change the subnet mask of the HQ router interface to the Internet.
Explanation:
The serial line connection between the Branch office and the HG office should have interfaces that belong in the same subnet. Based on the diagram above, the WAN interface of the Branch router is configured with an IP address that is in a different IP network than the serial interface of the HG router. As it is set up currently, no traffic will pass from the Branch router to the HG until these two interfaces are in the same subnet.
QUESTION 113:
A portion of he Certkiller network is shown in the diagram below:
Consider the 192.1.1.0/24 network in this exhibit. This network uses RIP v2.
Which combination of subnetwork assignments will satisfy the requirements for networks A, B, and C of this design? (Select three)
A. Network A = 192.1.1.128/25
B. Network A = 192.1.1.0/25
C. Network B = 192.1.1.252/30
D. Network B = 192.1.1.4/30
E. Network C = 192.1.1.64/26
F. Network C = 192.1.1.224/27
Explanation:
To properly answer this question, it is best to start from the end, which is network C.
Since network C requires at least 55 host addresses, a /26 network must be used. A network mask of /26 will provide for 62 usable IP addresses while a /27 network will only provide for 30 so we must choose E. With choice E taken, hosts within the range of 192.1.1.65-192.1.1.126 will be used.
For network A, both choices A and B are using the correct subnet mask, but we are only limited to choice A since many of the hosts in choice B are already being used in network C. Finally, for network B we are left with choice D since hosts in choice C are already being used by network A.
QUESTION 114:
Assume that RIP v1 is the only routing protocol in use. What is the Maximum number of usable IP address that can be supported on each LAN if the Certkiller network is using one Class C address block?
A. 14
B. 16
C. 30
D. 32
E. 62
F. 64
Explanation:
RIP version 1 does not support VLSM information, so all networks must have the same subnet mask. In the network above, there are a total of 12 networks (6 LANs and 6 different point to point WAN connections). Therefore, if each of the 12 networks use the 255.255.255.240 subnet mask, there will be a total of 16 networks with 14 usable hosts on each LAN.
Incorrect Answers:
C, E: These options will not provide enough separate networks. A total of 12 are required due to the use of a protocol that does not support VLSM.
D, F. These options omit the fact that we must subtract 2 addresses from the usable range for the network and broadcast IP addresses for each subnet.
QUESTION 115:
You are a technician at Certkiller . Your newly appointed Certkiller trainee wants to know what the CDP is.
What would your reply be? (Choose all that apply.)
A. It is globally enabled by default on Cisco routers.
B. It is globally enabled by default on all routers.
C. It is a proprietary protocol.
D. It is a non-proprietary protocol.
E. It can be used to gather hardware and protocol information about neighbor devices.
Explanation:
Cisco Discovery Protocol (CDP) is a Cisco proprietary protocol designed to help administrators collect information about local and remote devices. You can use the CDP to gather hardware and protocol information about neighbor devices, which can be useful for troubleshooting and documenting the network.
The CDP discovers basic information about neighboring routers and switches, without needing to know the passwords for the neighboring devices. CDP supports any LAN, HDLC, Frame Relay, and ATM interface- in fact; it supports any interface that supports the use of SNAP headers. The router or switch can discover Layer 2 and layer 3 addressing details of neighboring router without even configuring that Layer 3 protocol - this is because CDP is not dependant on any particular Layer 3 protocol.
QUESTION 116:
Five different routers are connected via varying point to point circuit types as displayed below:
Which of the following statements are true regarding how router A will chose a path to router E? (Choose three)
A. If RIP is the routing protocol, router A will determine all paths have an equal cost.
B. If RIP is the routing protocol, router A will install only the ADE path in its routing table.
C. If IGRP is the routing protocol, router A will determine that path ACE has the lowest cost.
D. If IGRP is the routing protocol, router A will determine that path ADE has the lowest cost.
E. If RIP and IGRP are both configured on router A, the router will use the route information learned by IGRP.
F. If RIP and IGRP are both configured on router A, the router will use the route information learned by RIP.
Explanation:
RIP simply uses hop counts as the metric for path determination, so RIP will see all routes as equal in this case. IGRP uses bandwidth and delay, by default, so it will prefer the paths over the T3 links. By default, IGRP routes are always preferred over RIP routes because IGRP has a lower Administrative Distance (AD) than RIP. The AD of IGRP is 100 while the AD of RIP is 120.
QUESTION 117:
You work as a network engineer at Certkiller .com. You are required to allow establishment of a Telnet session with a router Certkiller C.
Which set command must be configured?
A. Certkiller C(config)# line console 0
Certkiller C(config-line)# enable password Certkiller
B. Certkiller C(config)# line console 0
Certkiller C(config-line)# enable secret Certkiller
Certkiller C(config-line)# login
C. Certkiller C(config)# line console 0
Certkiller C(config-line)# password Certkiller
Certkiller C(config-line)# login
D. Certkiller C(config)# line vty 0
Certkiller C(config-line)# enable password Certkiller
E. Certkiller C(config)# line vty 0
Certkiller C(config-line)# enable secret Certkiller
Certkiller C(config-line)# login
F. Certkiller C(config)# line vty 0
Certkiller C(config-line)# password Certkiller
Certkiller C(config-line)# login
Explanation:
CLI Password Configuration:
QUESTION 118:
The Certkiller WAN is depicted below:
As a network technician at Certkiller .com you would like to implement NAT in the network shown in the exhibit. You would like to allow inside hosts to use a private addressing scheme. Where should NAT be configured?
A. Certkiller 1 router
B. Certkiller 2 router
C. Certkiller 3 router
D. All routers
E. All routers and switches
Explanation:
NAT should always be configured on the border device. It can be a either a border router or a PIX firewall connecting to the Internet.
QUESTION 119:
Which command will configure a default route on a router?
A. router(config)# ip route 0.0.0.0 10.1.1.0 10.1.1.1
B. router(config)# ip default-route 10.1.1.0
C. router(config)# ip default-gateway 10.1.1.0
D. router(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1
Explanation:
The command "IP route 0.0.0.0 0.0.0.0
Incorrect Answers:
A. This will be an invalid route, since the "10.1.1.0" value will specify the network mask, which in this case is invalid.
B, C. These commands are invalid. The command "ip default-network" could be used, but not "ip default-route" or "ip default-gateway". IP default-gateway is used on switches, not routers.
QUESTION 120:
In which situation would the use of a static route be appropriate?
A. To configure a route to the first Layer 3 device on the network segment.
B. To configure a route from an ISP router into a corporate network.
C. To configure a route when the administrative distance of the current routing protocol is too low.
D. To reach a network is more than 15 hops away.
E. To provide access to the Internet for enterprise hosts.
Explanation:
Static routes are special routes that the network administrator manually enters into the router configuration. Stub networks are the ideal candidate for static routes.
There is no need to run a routing protocol over the WAN links between an ISP Router and a corporate network when only a single Internet link exists.
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