OSPF Protocol

With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?

• Point-to-point

• Backbone area 0

• Broadcast multi-access

• Non-broadcast multi-access

Which of the following describe the process identifier that is used to run OSPF on a router?

1.It is locally significant.

2.It is globally significant.

3.It is needed to identify a unique instance of an OSPF database.

4.It is an optional parameter required only if multiple OSPF processes are running on the router.

• 1, 2 and 4

• 1 and 3

• 3 and 5

• All of the above

What is the administrative distance of OSPF?

• 90

• 100

• 110

• 120

Which of the following are true regarding OSPF areas?

1. You must have separate loopback interfaces configured in each area.
2. 2. The numbers you can assign an area go up to 65,535.
3. The backbone area is also called area 0.
4. If your design is hierarchical, then you don't need multiple areas.
5. All areas must connect to area 0.

• 1 only

• 1 and 2 only

• 3 and 4 only

• 3, 4 and 5

What are reasons for creating OSPF in a hierarchical design?

1. To decrease routing overhead
2. To speed up convergence
3. To confine network instability to single areas of the network
4. To make configuring OSPF easier

• 1, 2 and 3

• 3 only

• 3 and 4

• 2, 3 and 4

Which two of the following commands will place network 10.2.3.0/24 into area 0?

1. router eigrp 10
2. router ospf 10
3. network 10.0.0.0
4. network 10.2.3.0 0.0.0.255 area0
5. network 10.2.3.0 0.0.0.255 area 0

• 1 and 4

• 2, 4, and 5

• 2 and 5

• 3 and 4

If routers in a single area are configured with the same priority value, what value does a router use for the OSPF Router ID in the absence of a loopback interface?

• The lowest IP address of any physical interface

• The highest IP address of any physical interface

• The lowest IP address of any logical interface

• The highest IP address of any logical interface

Which of the following protocols support VLSM, summarization, and discontiguous networking?

1. RIPv1
2. IGRP
3. EIGRP
4. OSPF
5. BGP
6. RIPv2

• 1 and 4

• 2 and 5

• 3, 4 and 6

• All of the above

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?

• The wildcard mask is incorrect.

• The OSPF area is wrong.

• The OSPF Process ID is incorrect.

• The AS configuration is wrong.

Which of the following network types have a designated router and a backup designated router assigned?

1. Broadcast
2. Point-to-point
3. NBMA
4. NBMA point-to-point

• 1, 2 and 3

• 1 and 3

• 3 and 4

• All of the above