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Q:

Two connected routers are configured only with RIP routing. What will be the result when a router receives a routing update that contains a higher-cost path to a network already in its routing table?

A) The updated information will be added to the existing routing table	B) The update will be ignored and no further action will occur
C) The updated information will replace the existing routing table entry	D) The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence

Answer & Explanation Answer: B) The update will be ignored and no further action will occur

Explanation:

When a routing update is received by a router, the router first checks the administrative distance (AD) and always chooses the route with the lowest AD. However, if two routes are received and they both have the same AD and differing metrics , then the router will choose the one route with the lowest metrics or , in RIP's case, hop count.

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Q:

If your routing table has a static, a RIP, and an EIGRP route to the same network, which route will be used to route packets by default?

A) Any available route	B) RIP route
C) Static route	D) EIGRP route

Answer & Explanation Answer: C) Static route

Explanation:

Static routes have an administrative distance of 1 by default. Unless you change this, a static route will always be used over any other dynamically learned route. EIGRP has an administrative distance of 90, and RIP has an administrative distance of 120, by default

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Q:

A network administrator views the output from the show ip route command. A network that is advertised by both RIP and EIGRP appears in the routing table flagged as an EIGRP route. why is the RIP route to this network not used in the routing table?

A) EIGRP has a faster update timer	B) EIGRP has a lower administrative distance
C) RIP has a higher metric for that route	D) The RIP path has a routing loop

Answer & Explanation Answer: B) EIGRP has a lower administrative distance

Explanation:

RIP has an administrative distance (AD) of 120, while EIGRP has an administrative distance of 90, so the router will discard any route with a higher AD than 90 to that same network.

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Q:

Which command displays RIP routing updates?

A) Show ip route	B) debug ip rip
C) show protocols	D) Debug ip route

Answer & Explanation Answer: B) debug ip rip

Explanation:

Debug ip rip is used to show the internet Protocol (IP) Routng Information protocol (RIP) updates being sent and received on the router.

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Q:

Which of the following is the best description of the operation of split horizon?

A) Information about a route should not be sent back in the direction from which the original update came	B) It splits the traffic when you have a large bus (horizon) physical network
C) It holds the regular updates from broadcasting to a downed link	D) It prevents regular update messages from reinstating a route that has gone down

Answer & Explanation Answer: A) Information about a route should not be sent back in the direction from which the original update came

Explanation:

A split horizon will not advertise a route back to the same router it learned the route from.

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Q:

You are troubleshooting a connectivity problem in your corporate network and want to isolate the problem. You suspect that a router on the route to an unreachable network is at fault. What IOS user exec command should you issue?

A) Router>ping	B) Router>trace
C) Router>show ip route	D) Router>show interface

Answer & Explanation Answer: B) Router>trace

Explanation:

The command traceroute (trace for short), which can be issued from user mode or privileged mode, is used to find the path a packet takes through an internetwork and will also show you where the packet stops because of an error on a router.

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Q:

The corporate office sends you a new router to connect, but upon connecting the console cable, you see that there is already a configuration on the router. What should be done before a new configuration is entered in the router?

A) RAM should be erased and the router restarted	B) Flash should be erased and the router restarted
C) NVRAM should be erased and the router restarted	D) The new configuration should be entered and saved

Answer & Explanation Answer: C) NVRAM should be erased and the router restarted

Explanation:

Before you start to configure the router, you should erase the NVRAM with the erase startup-config command and then reload the router using the reload command.

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Q:

You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

A) You copied the wrong configuraion into RAM	B) You copied the configuration into flash memory instead
C) The copy did not override the shutdown command in running-config	D) The IOS became corrupted after the copy command was initiated

Answer & Explanation Answer: C) The copy did not override the shutdown command in running-config

Explanation:

Since the configuration looks correct, you probably didn't screw up the copy job. However , when you perform a copy from a network host to a router , the interfaces are automatically shut dow and need to be manually enabled with the no shutdown command.

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