routing Search

Q:

In OSI network architecture, the routing is performed by

A) transport layer	B) session layer
C) network layer	D) data link layer

Answer & Explanation Answer: C) network layer

Explanation:

in_osi_network_architecture_the_routing_is_performed_by1553604163.jpg image

In networking, the Open Systems Interconnection is commonly called as OSI model. It has a 7 layer architecture for the communication.

In OSI network architecture, the routing is performed by network layer which is layer number 3 with the help of intermediate routers.

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Q:

You want to enable dynamic routing on a Windows 2000 Server computer on your TCP/IP network . You want this computer to manage the propagation of multicast traffic throught your network. Which routing protocol should you use?

A) IGMP Version2, Router and Proxy	B) Open Shortest Path First (OSPF)
C) RIP Version 2 for Internet Protocol	D) Network Address Translation(NAT)

Answer & Explanation Answer: A) IGMP Version2, Router and Proxy

Explanation:

IGMP is the only routing protocol that manages multicast traffic.

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Filed Under: MCSE-Microsoft Certified Solutions Expert

Q:

How should a router that is being used in a Frame Relay network be configured to keep split horizon issues from preventing routing updates

A) Configure a seperate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface	B) Combine multiple Frame Relay circuits as a point-to-point line to support multicast and broadcast traffic
C) Configure many subinterfaces in the same subnet	D) Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces.

Answer & Explanation Answer: A) Configure a seperate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface

Explanation:

If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay.

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Filed Under: CCNA

Q:

There are three possible routes for a router to reach a destination network. The first route is from OSPF with a metric of 782. The second route is from RIPv2 with a metric of 4. The third is from EIGRP with a composite metric of 20514560. Which route will be installed by the router in its routing table?

A) RIPv2	B) EIGRP
C) OSPF	D) All three

Answer & Explanation Answer: B) EIGRP

Explanation:

Only the EIGRP routes will be placed in the routing table because it has the lowest administrative distance (AD), and that is always used before metrics.

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Filed Under: CCNA

Q:

You get a call from a network administrator who tells you that he typed the following into his router:

Router (config) #router ospf 1

Router (config-router) # network 10.0.0.0. 255. 0.0.0 area 0

He tells you he still can't see any routes in the routing table. What configuration error did the administrator make?

A) The wildcard mask is incorrect	B) The OSPF area is wrong
C) The OSPF Process ID is incorrect.	D) The AS configuration is wrong

Answer & Explanation Answer: A) The wildcard mask is incorrect

Explanation:

The administrator typed in the wrong wildcard mask configuration. The wildcard should have been 0.0.0.255 or even 0.255.255.255.

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Filed Under: CCNA

Q:

A network administrator needs to configure a router with a distance-vector protocol that allows classless routing. Which of the following satisfies those requirements?

A) IGRP	B) OSPF
C) RIPv1	D) EIGRP

Answer & Explanation Answer: D) EIGRP

Explanation:

In this question, we're calling EIGRP just plain old distance vector. EIGRP is an advanced distance-vector routing protocol, sometimes called a hybrid routing protocol because it uses the characteristics of both distance-vector and link-state routing protocols.

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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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Filed Under: CCNA

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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Filed Under: CCNA

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