Testking_640-802_V13

The question describes 2 important requirements. The first is the fact that a routing protocol that supports VLSM is needed, as specified by the fact that one class C address range is to be used for all networks. The second important requirement is that routers from multiple vendors are being used, so the routing protocol chosen must be non-proprietary. RIP version 2 is a standards based routing protocol that supports variable length subnet masking (VLSM). Note that OSPF would also be a viable choice, but it was not one of the answer choices.

Incorrect Answers:

A.This is not a routing protocol.

B.RIP version 1 does not support VLSM

D, E: Although these both support VLSM, IGRP and EIGRP are Cisco proprietary routing protocols which are not supported by other router vendors.

QUESTION NO: 12

The TestKing WAN is displayed in the diagram below:

Based on the information shown above, which routing protocols can be used within the TestKing network show in the diagram? (Choose three).

A.RIP v1

B.RIP v2

C.IGRP

D.OSPF

E.BGP

F.EIGRP

Answer: B, D, F

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Explanation: the exhibit showed routers withVariable Length Subnet Mask (VLSM), and asked which 3 protocols can be used. 3 protocols that support VLSM are RIP v2, OSPF and EIGRP.

Incorrect Answers:

A, C: Both of these routing protocols do not support VLSM information.

E. BGP is used for external routing between different autonomous systems, and is not generally used within a single AS.

QUESTION NO: 13

The TestKing Network consists of the following 5 IP networks:

NETWORK 1: 192.168.10.0/26

NETWORK 2: 192.168.10.64/27

NETWORK 3: 192.168.10.96/27

NETWORK 4: 192.168.10.128/30

NETWORK 5: 192.168.10.132/30

Which of the following routing protocols will support this IP addressing scheme? (Choose all that apply).

A.RIP version 1

B.RIP version 2

C.IGRP

D.EIGRP

E.OSPF

F.BGP

Answer: B, D, E Explanation:

Because this network is using IP subnets with variable length subnet masks, only routing protocols that support VLSM will fit this particular case. The routing protocols that support VLSM are RIP v2, EIGRP and OSPF.

Incorrect Answers:

A, C: RIP version 1 and IGRP do not support VLSM information within the routing updates.

F. BGP is used for inter-AS routing, such as the Internet. It is not normally used as an Interior routing protocol.

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QUESTION NO: 14

The TestKing network is shown in the following exhibit:

Which routing protocols can be used within the TestKing network shown in the diagram? (Choose three.)

A.RIP v1

B.RIP v2

C.IGRP

D.OSPF

E.BGP

F.EIGRP

Answer: B, D, F Explanation:

In this network there are IP subnets which use variable length subnet masks. RIP V2, OSPF and EIGRP are the interior routing protocols that support VLSM.

QUESTION NO: 15

TestKing.com is merging with several local businesses that use routers from multiple vendors. Which routing protocol would work best to connect TestKing.com with the enterprise networks it has acquired by providing scalability and VLSM support while minimizing network overhead?

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A.IGRP

B.EIGRP

C.OSPF

D.RIP v2

E.RIP v1

Answer: D Explanation:

RIP (both version 1 and version 2) is standards based, providing inter-operability support between vendors. RIPv2 is an enhancement to the first version and contains the following enhancements:

1.Support for variable length subnet masks (VLSM) (Because of this, RIP doesn't assume that all networks are classful.)

2.Multicast routing updates

3.Authentication with an encrypted password for routing updates

Incorrect Answers:

A, B: IGRP and EIGRP are Cisco proprietary routing protocols that are not supported by other vendors.

C: OSPF is a CPU-intensive protocol, and very large OSPF networks can experience routing and update traffic problems that seriously impact network performance. In addition, routers in large OSPF networks require large amounts of memory.

E: RIPv1 does not support VLSM.

QUESTION NO: 16

The Testking WAN is displayed in the diagram below:

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Which dynamic routing protocol should be recommended for the Testking network shown in the graphic above? (Choose three)

A.OSPF

B.RIP version 1

C.RIP version 2

D.IGRP

E.EIGRP

Answer: A, C, E Explanation:

In this network, the 192.168.23.0/24 network is subnetted into two other networks. Because this class C network is being subnetted, a routing protocol that supports variable length subnet mask information is required. OSPF, EIGRP, and RIP version 2 all support VLSM information to be shared across the network.

Incorrect Answers:

B, D. RIP version 1 and IGRP do not support VLSM, which will be required in order for this network to have the two LANs both be reachable.

QUESTION NO: 17

Router TK1 learns about a remote network from EIGRP, OSPF, and a static route. Assuming all routing protocols are using their default administrative distance, which route will TK1 use to forward data to the remote network?

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A.The router will use the static route.

B.The router will use the OSPF route.

C.The route will use the EIGRP route.

D.The router will load balance and use all three routes.

E.None of the above

Answer: A Explanation:

When a router learns about the same network via multiple sources, the router will choose the source with the lowest administrative distance (AD). By default, the AD for these routing protocols are:

Connected Interface has 0 AD

Static Route : 1

EIGRP : 90

OSPF : 110

So, the static route will be chosen since it has the lowest AD.

QUESTION NO: 18

A TestKing router learns two routes to a remote network, one route via OSPF and one route via RIPv2. The network administrator wants the router to install the route learned via RIPv2 into its routing table. What should the network administrator configure to ensure that the router will use the route learned via RIPv2?

A.Nothing. The router will automatically use routes learned via RIP over routes learned via OSPF.

B.The network administrator should configure the routers along the OSPF path with lower priority numbers.

C.The network administrator should configure the router interface on the OSPF path to be a passive interface.

D.The network administrator should configure an administrative distance for RIP that is lower than the administrative distance of OSPF.

E.If two paths exist to a remote network, the only way to force the router to prefer one path over the other is to configure the preferred path as a static route.

Answer: D

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Explanation:

When multiple routing protocols are configured for the same networks, the router will use the path with the lowest Administrative Distance (AD). By default, OSPF has and AD of 110 and RIP has an AD of 120. In order to ensure that the router prefers the route learned via RIP over OSPF, the AD of the RIP route must be reduced to a value less than 120.

QUESTION NO: 19

Routers TestKing1 and TestKing 2 are connected as shown below:

The TestKing network associate has configured the internetwork that is shown above, but has failed to configure routing properly. Which configuration combinations will allow the hosts on the TestKing2 LAN to access resources on the TestKing1 LAN with the least impact on router processing and WAN bandwidth?

A. TestKing1(config)# router ospf 1

TestKing1(config-router)# network 192.168.2.4 0.0.0.3 area 0

TestKing1(config-router)# network 172.16.25.0 0.0.0.255 area 0

TestKing2(config)# router ospf 1

TestKing2 (config-router)# network 192.168.1.0 0.0.0.255 area 0

TestKing2 (config-router)# network 192.168.2.4 0.0.0.3 area 0

B.TestKing1(config)# router rip TestKing1(config-router)# network 192.168.2.0 TestKing1(config-router)# network 172.16.0.0 TestKing2(config)# router rip

TestKing2 (config-router)# network 192.168.1.0 TestKing2 (config-router)# network 192.168.2.0

C.TestKing1(config)# ip route 192.168.1.0 255.255.255.0 192.168.2.5 TestKing2(config)# ip route 172.16.25.0 255.255.255.0 192.168.2.6

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D. TestKing1(config)# router eigrp 56

TestKing1(config-router)# network 192.168.2.4

TestKing1(config-router)# network 172.16.25.0

TestKing2(config)# router eigrp 56

TestKing2 (config-router)# network 192.168.1.0

TestKing2 (config-router)# network 192.168.2.4

Answer: C

QUESTION NO: 20

You need to choose a routing protocol for use in the TestKing network that meets the following requirments:

Which routing protocol fulfills these requirements?

A.OSPF

B.RIPv2

C.RIPv1

D.EIGRP

E.None of the above

Answer: A

QUESTION NO: 21

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You have been tasked with choosing a routing protocol that would best fit the needs of the TestKing network. Which routing protocol uses bandwidth and delay as metrics, by default?

A.EIGRP

B.OSPF

C.BGP

D.RIPv1

E.RIPv2

F.None of the above

Answer: A

QUESTION NO: 22

Non-contiguous networks can pose a problem for network reachability in certain circumstances. Which of the following routing protocols have means of minimizing the risk? (Select three choices)

A.RIP v1

B.RIP v2

C.EIGRP

D.IGRP

E.OSPF

F.VLSM

Answer: B, C, E Explanation:

OSPF, RIP version 2, and EIGRP all provide support for discontiguous networks. This is provided by the fact that subnet mask information is advertised along with the routes, and these protocols all support Variable Length Subnet Masks (VLSM).

Incorrect Answers:

A. Whenever RIP version 1 advertises a network across a different major net boundary, RIP summarizes the advertised network at the major net boundary. RIP version 2 is an updated version of RIP, and one of the main features that it was able to provide over RIPv1 is support for VLSM information.

D. IGRP does not support VLSM. Like RIP version 2, EIGRP is the updated version of IGRP, which provides support for VLSM.

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F. VLSM is the feature that is required to support non-contiguous networks, but VLSM is not itself a routing protocol.

QUESTION NO: 23

Which of the following technologies can be used in distance vector routing protocols to prevent routing loops? (Select two)

A.Spanning Tree Protocol

B.Shortest path first tree

C.Link-state advertisements (LSA)

D.Hold-down timers

E.Split horizon

F.VRP

Answer: D, E

Explanation:

In order to prevent information from looping throughout a network, distance vector protocols, such as RIP version 2, use the following mechanisms:

*Splithorizon - the routing protocol advertises routes out an interface only if they were not learned from updates entering that interface.

*Hold-down timer - After finding out that a router to a subnet has failed, a router waits a certain period of time before believing any other routing information about that subnet. In addition to these, a finite number of hops are also used. This ensures that packets do not loop through a network indefinitely.

Reference: CCNA Self-Study CCNA ICND exam certification Guide (Cisco Press, ISBN 1-58720-083-X) Page 154.

QUESTION NO: 24

Which of the following routing protocols are less likely prone to problems in non contiguous networks? (Select all valid responses)

A.IGRP

B.ICMP

C.OSPF

D.RIP v1

E.RIP v2

F.EIGRP

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