9 04 2014

QUESTION 21
Refer to the exhibit. EIGRP is enabled on all routers on the network. What additional configuration is required for the routers connected over the Frame Relay multipoint interfaces to compensate for a low-speed NBMA connection?

A.    Configure the EIGRP hello interval on all Frame Relay interfaces to 5 seconds.
B.    Configure the EIGRP hello interval on all Frame Relay interfaces to 60 seconds.
C.    Configure the EIGRP hold time on all Frame Relay interfaces to 15 seconds.
D.    Configure the EIGRP hold time on all Frame Relay interfaces to 180 seconds.
E.    Configure the bandwidth on all EIGRP Frame Relay interfaces to the committed information rate (CIR).
F.    Configure the bandwidth on all EIGRP Frame Relay interfaces to the lowest CIR multiplied by the
number of PVCs for the multipoint connection.

Answer: F

QUESTION 22
A network administrator would like to configure an EIGRP router as a stub router that advertises directly connected and summary routes only. What command must the administrator issue to accomplish this?

A.    eigrp stub
B.    eigrp stub connected
C.    eigrp stub summary
D.    eigrp stub connected static
E.    eigrp stub receive-only

Answer: A
Explanation:
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/eigrpstb.html#wp1036215

QUESTION 23
Refer to the partial configurations in the exhibit. What address is utilized for DR and BDR identification on Router1?

A.    the serial 1/1 address
B.    the serial 2/0 address
C.    a randomly generated internal address
D.    the configured router-id address

Answer: D
Explanation:
The point of this question is DR and BDR election of OSPFv3.
OSPF test the title of the DR and BDR election.
DR and BDR election there are two standards:
1. Interface priority, the default is 1.
2. Router-iD. manually specify> Highest loopback interface> Highest active IP address This title, there is no priority list, it is the default, manually specify the Router-iD. 10.1.1.3, so hand- Router-id specified in the election has become the standard DR and BDR. The selection of DR and BDR is the same between OSPFv2 and OSPFv3.

QUESTION 24
Which two routing protocols require a metric to be configured when redistributing routes from other protocols? (Choose two.)

A.    RIP
B.    OSPF
C.    EIGRP
D.    IS-IS
E.    BGP

Answer: AC
Explanation:
Metrics must be set manually via configuration when redistributing into RIP and EIGRP, whereas OSPF uses a default value of 20.
Example:
EIGRP
router eigrp 1
redistribute ospf 1 metric 1544 5 255 1 1500
redistribute rip metric 1544 5 255 1 1500
network 15.0.0.0
RIP
router rip
version 2
redistribute eigrp 1 metric 2
redistribute ospf 1 metric 3
network 16.0.0.0

QUESTION 25
By default, which statement is correct regarding the redistribution of routes from other routing protocols into OSPF? Select the best response.

A.    They will appear in the OSPF routing table as type E1 routes.
B.    They will appear in the OSPF routing table as type E2 routes.
C.    Summarized routes are not accepted.
D.    All imported routes will be automatically summarized when possible.
E.    Only routes with lower administrative distances will be imported.

Answer: B
Explanation:
Type E1 external routes calculate the cost by adding the external cost to the internal cost of each link that the packet crosses while the external cost of E2 packet routes is always the external cost only. E2 is useful if you do not want internal routing to determine the path. E1 is useful when internal routing should be included in path selection. E2 is the default external metric when redistributing routes from other routing protocols into OSPF.

QUESTION 26
Refer to the exhibit. What is required to complete the IPv6 routing configurations shown? Select the best response.

A.    Interface authentication must be configured.
B.    The routing processes must be configured with an area ID.
C.    IP unicast routing must be enabled.
D.    IPv4 addresses must be applied to the interfaces.

Answer: C
Explanation:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_55_se/configur ation/guide/swiprout.html

QUESTION 27
When implementing OSPFv3, which statement describes the configuration of OSPF areas? Select the best response.

A.    In interface configuration mode, the OSPFv3 area ID combination assigns interfaces to OSPFv3
areas.
B.    In router configuration mode, the network wildcard area ID combination assigns networks to OSPFv3
areas.
C.    In interface configuration mode, the IPv6 OSPF process area ID combination assigns interfaces to
OSPFv3 areas.
D.    In router configuration mode, the IPv6 OSPF interface area ID combination assigns interfaces to
OSPFv3 areas.

Answer: C
Explanation:
http://www.hh.se/download/18.4cf286ee134f03ddb7b800015/1326882212358/Chapter3_VT2012.
pdf (slide 42)

QUESTION 28
Refer to the exhibit. Routers R1 and R2 have been configured to operate with OSPF. Routers R1 and R3 have been configured to operate with RIP. After configuring the redistribution between OSPF and RIP on R1, no OSPF routes are distributed into RIP. What should be done to correct this problem?

A.    The redistribution command should be reentered with the match route-type parameter included.
B.    The redistribution command should be reentered with the route-map map-tag parameter included.
C.    The redistribution command should be reentered with the metric metric-value parameter included.
D.    Routes will first need to be distributed into another protocol, and then into RIP.

Answer: C
Explanation:
Notice that RIP metric is based on hop count only, and the maximum valid metric is 15. Anything above 15 is considered infinite. By default, when no metric is assigned when redistributing from EIGRP, OSPF, IS-IS, BGP into RIP, the default metric will be infinite. Therefore we must define a metric that is understandable to the receiving protocol. Usually, we should use a small value (like 1, 2, 3) so that after redistributing, that route can be advertised through many routers (because the limit is 15).

QUESTION 29
When troubleshooting an EIGRP connectivity problem, you notice that two connected EIGRP routers are not becoming EIGRP neighbors. A ping between the two routers was successful. What is the next thing that should be checked? Select the best response.

A.    Verify that the EIGRP hello and hold timers match exactly.
B.    Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip
EIGRP peer command.
C.    Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip
EIGRP traffic command.
D.    Verify that EIGRP is enabled for the appropriate networks on the local and neighboring router.

Answer: D
Explanation:
The point of this question is about the condition of establish EIGRP neighbor. You can use these ways to troubleshoot the EIGRP connectivity problem.
1. Whether EIGRP is enabled for the proper networks.
2. Whether the K values of EIGRP neighbors is the same.
3. Whether EIGRP autonomous number is the same.

QUESTION 30
Refer to the exhibit. It is desired to set up a BGP neighbor relationship between routers R1 and R4. BGP packets between them could travel through R2 or R3. What is the simplest configuration that will allow for failover? Select the best response.

A.    Configure BGP neighbor relationships between all interfaces on R1 and R4.
B.    Install a direct connection between R1 and R4.
C.    Configure loopback interfaces on R1 and R4 to provide the update source address for BGP packets.
D.    Configure only one neighbor relationship between R1’s 192.168.1.2 interface and R4’s 172.16.10.2
interface.

Answer: C
Explanation:
Assume R4 only uses this configuration:
R4(config)#router bgp 65000
R4(config-router)#neighbor 192.168.1.2 remote-as 65000
Then if R1 sends BGP packets to R4 via R3, the source IP address of the packets is 192.168.2.2. But R4 does not recognize this IP address because 192.168.2.2 is not configured in the "neighbor" command of R4. Therefore the IBGP session between R1 & R4 is not established -> these
packets will be dropped.
The simplest configuration to allow R1 and R4 communicate via both R2 & R3 is to use a loopback interface address rather than a physical interface address as the source IP address for all BGP packets. To do this, use the command:
R4(config-router)#neighbor 1.1.1.1 update-source loopback0 (In which 1.1.1.1 is the loopback interface of R1). In practical, we should establish neighborship with the loopback interface rather than the physical interface because if the physical interface goes down, the neighborship would be lost while a loopback interface never goes down. Also, when configuring "1.1.1.1 as the neighbor, you must configure on R1 the "neighbor 4.4.4.4 update-source loopback0" command so that the source IP address of packets sent from R1 (loopback0 ?1.1.1.1) will be matched with the neighbor command configured on R4.

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