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QUESTION NO:21

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

Correct Answer: D Explanation

Explanation/Reference:

In OSPFv3 and OSPF version 2, the router uses the 32-bit IPv4 address to select the router ID for an OSPF process. The router ID selection process for OSPFv3 is described below (same as OSPF version 2):

1.

The router ID is used if explicitly configured with the router-id command.

2.

Otherwise, the highest IPv4 loopback address is used.

3.

Otherwise, the highest active IPv4 address.

4.

Otherwise, the router ID must be explicitly configured.

In this case the router ID 10.1.1.3 is explicitly configured

QUESTION NO:15

What is the purpose of the eigrp stub configuration command?

A. to increase scalability by limiting the EIGRP query range

B. to reduce the size of the routing table by blocking the D EX (External EIGRP) routes into the EIGRP stub router

C. to reduce the convergence time by enabling the EIGRP stub router to propagate the EIGRP queries from the EIGRP hub router

D. to reduce the convergence time by enabling the EIGRP stub router to also perform query requests to the EIGRP hub router

Correct Answer: A Explanation

Explanation/Reference:

The EIGRP Stub Routing feature improves network stability, reduce resources utilization, and simplifies stub router configuration. Stub routing is commonly used in a hub and spoke network topology. You need to configure the distribution (hub) and remote (spoke) routers to use EIGRP, and only the remote router as a stub. Only specified routes are propagated from the stub router. The router responds to queries for summaries, connected routes, redistributed static routes, external routes, and internal routes with the message “inaccessible”. A stub router will send a special peer information packet to all neighboring routers to report its status as a stub router. Any neighbor that receives a packet informing it of the stub status will not query the stub router for any routes, and a router that has a stub peer will not query that peer. The stub router will depend on the distribution router to send the proper updates to all peers.

QUESTION NO:26

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-typeparameter included.

B. The redistribution command should be reentered with the route-map map-tagparameter 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.

Correct Answer: C Explanation

Explanation/Reference:

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 NO:13

A network administrator assigns a multicast address of 239.255.8.5 to an application running on a device with an Ethernet MAC address of 01.b2.7d.05.f1.80. Which Layer 2 multicast address will this device use?

A. 01.00.5e.7F.08.05

B. 01.b2.7d.05.f1.80

C. 01.b2.7d.0a.08.05

D. 01.00.5e.05.f1.80

E. ff.ff.ff.ff.ff.ff

Correct Answer: A Explanation

Explanation/Reference:

QUESTION NO:12

What are three kinds of OSPF areas? (Choose three.)

A. stub

B. active

C. remote

D. backbone

E. ordinary or standard

Correct Answer: ADE Explanation

Explanation/Reference:

QUESTION NO:1

Which statement is true about the implementation of IPv6 in an already existing IPv4 network?

A. IPv6 can be routed using the same routing protocol versions as IPv4

B. A router routing for IPv6 and IPv4 must convert IPv4 packets to IPv6 packets to route them.

C. IPv4 and IPv6 networks can be routed simultaneously.

D. Only OSPF version 3 can be utilized for routing IPv4 and IPv6.

Correct Answer: C Explanation

Explanation/Reference:

QUESTION NO:10

Refer to the exhibit. Given the exhibited router output, which command sequence can be added to R1 to generate a default route into the OSPF domain?

A. default-router

B. ip default-network

C. default-information originate always

D. ip default-gateway

Correct Answer: C Explanation

Explanation/Reference:

QUESTION NO:23

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.

Correct Answer: B Explanation

Explanation/Reference:

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 -> B is correct.

QUESTION NO:7

Which two statements are true about EIGRP manual summarization? (Choose two.)

A. Manual summarization is configured on a per interface basis.

B. Manual summaries can be configured with the classful mask only.

C. When manual summarization is configured, autosummarization is automatically disabled by default.

D. The summary address is assigned an administrative distance of 10 by default.

E. The summary address is entered into the routing table and is shown to be sourced from the Null0 interface.

Correct Answer: AE Explanation

Explanation/Reference:

QUESTION NO:17

Which command displays statistics on EIGRP hello, updates, queries, replies, and acknowledgments?

A. debug eigrp packets

B. show ip eigrp traffic

C. show ip eigrp topology

D. show ip eigrp neighbors

Correct Answer: B Explanation

Explanation/Reference:

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