Cisco-Implementing Cisco IP Routing Set 1

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Cisco-Implementing Cisco IP Routing Set 1

What is the difference between the IPv6 addresses ::/0 and ::/128? Select the best response.

::/0 is the unspecified address, and ::/128 is the multicast address. ✘ ::/0 is the unicast address, and ::/128 is the anycast address. ✘ ::/0 is the unicast address, and ::/128 is the multicast address. ✘ ::/0 is the anycast address, and ::/128 is the multicast address. ✔ ::/0 is the default route, and ::/128 is the unspecified address. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Refer to the output. What IOS command produces this output? Select the best response.

show ip ospf ✘ show ip ospf interface ✘ show ipv6 ospf interface ✘ show ipv6 ospf ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

A router has two paths to reach another network in a different autonomous system. Neither route was generated by the local router and both routes have the same default weight and local preference values. Which statement is true about how BGP would select the best path? Select the best response.

If the command bgp always-compare-med has been given, then the router will prefer the route with the highest MED. ✘ The router will prefer the route with the lower MED. ✘ The router will prefer the shortest autonomous system path. ✘ To influence one route to be preferred, its default local preference value will be changed via the use of the command bgp default local-preference 50. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

How is authentication handled with OSPFv3? Select the best response.

OSPFv3 for IPv6 authentication is supported by SHA-1 authentication. ✘ OSPFv3 for IPv6 authentication is supported by MD5 authentication. ✘ OSPFv3 for IPv6 authentication is supported by IPv6 IPsec. ✘ OSPFv3 for IPv6 authentication is supported by IPv4 IPsec. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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

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

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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

In interface configuration mode, the OSPFv3 area ID combination assigns interfaces to OSPFv3 areas. ✘ In router configuration mode, the network wildcard area ID combination assigns networks to OSPFv3 areas. ✘ In interface configuration mode, the IPv6 OSPF process area ID combination assigns interfaces to OSPFv3 areas. ✘ In router configuration mode, the IPv6 OSPF interface area ID combination assigns interfaces to OSPFv3 areas. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which statement is true about OSPF Network LSAs? Select the best response.

They are originated by every router in the OPSF network. They include all routers on the link, interfaces, the cost of the link, and any known neighbor on the link. ✘ They are originated by the DR on every multi-access network. They include all attached routers including the DR itself. ✘ They are originated by Area Border Routers and are sent into a single area to advertise destinations outside that area. ✘ They are originated by Area Border Router and are sent into a single area to advertise an Autonomous System Border Router. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You have just completed an OSPF implementation. While executing your verification plan, you determine that R1 is not able to establish full OSPF adjacency with R2. The show ip ospf neighbor command output on R1 shows that R2 is stuck in the INIT state. What could be the cause of this problem? Select the best response.

DR and BDR election errors between R1 and R2. ✘ The R2 router has not received the OSPF hello packets from the R1 router. ✘ Mismatched interface maximum transmission unit (MTU) configuration between the R1 and R2. ✘ Mismatched OSPF hello interval configuration between the R1 and R2. ✔ Corrupted LSAs exchanges between the R1 and R2. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You have completed an OSPF implementation, and you are verifying OSPF operation. During this verification, you notice that the OSPF route of 172.16.10.0 is repeatedly appearing and disappearing from the routing table. Further investigation finds that the OSPF CPU utilization is very high and the routers are constantly performing SPF calculations. You determine that 172.16.20.2 is the source of the 172.16.10.0 route. Using the show ip ospf database router 172.16.20.1 command, you notice that when this show command is performed repeatedly, the contents of the LSA change every few seconds. What could be the cause of this problem? Select the best response.

OSPF authentication errors between some of the routers. ✘ Two routers have the same OSPF router ID. ✘ Issues with mistuned OSPF timers. ✘ OSPF LSA pacing issues between some of the routers. ✔ OSPF neighbor adjacency problems between some of the routers. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

10.

When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers? Select the best response.

OSPF process ID ✘ OSPF router ID ✘ OSPF network type ✘ OSPF memory usage ✔ OSPF CPU utilization ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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