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Is3120

In: Science

Submitted By articwolf828
Words 324
Pages 2
Instructions: Research all of the concepts below, answer the following questions, and then respond to the questions about the configurations on pages 2 and 3.

Research the following concepts:

• Area border router (ABR)

• Autonomous system boundary router (ASBR)

• Designated router (DR )

• Backup designated router (BDR)

Answer the following questions:

1. When would you use an ABR as opposed to an ASBR?

The time I would use ABR as opposed to ASBR is when I want to connect one or more OSPF areas to the backbone of the Network

2. What are the effects of using two OSPF processes?

The effects of using two OSPF process would be you having absolute control over what prefixes are advertised between the two OSPF processes

3. What is the difference between a DR as opposed to BDR?

DR and Bdr concept work in broadcast multi access network.

It reduces Lsa flooding within broadcast domain by electing

one DR and Bdr to which other routers in broadcast domain

Form adjacency. So that only Dr and BDR have full adjacency

That means full link state database.

4. How does the election process work?

a network with 3 OSPF routers on a Fast Ethernet network. They are connected to the same switch (multi-access network) so there will be a DR/BDR election. OSPF has been configure so all routers have become OSPF neighbors,

Instructions: a is ABSR B is ABR and C is ABR

5. By writing in the diagram above, label A, B, and C as ABR or ASBR.

Instructions:

6. By writing in the diagram above, select which routers are the DR and BDR.

A is DR and B is BDR

-----------------------

A

B

C

BGP

RIP

A

B

C

F

E

D

G

Instructions:

1. By writing in the diagram above, label A, B, and C as ABR or ASBR.

3. If router B is removed, will router C automatically take its place? Why or why not?…...

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