4A0-101 Online Practice Questions and Answers

What is the value of the protocol discriminator used to denote IS-IS protocol information?

A. 89

B. 87

C. 85

D. 83

What is the default priority value used for electing the DR on an Alcatel-Lucent 7750 SR running OSPF on an Ethernet?

A. Priority of 0

B. Priority of 1

C. Priority of 64

D. Priority of 255

Click the exhibit button A. The route policy should be applied as in import policy

The 192 168 3.0/24 network is learned on router R1 via IS-IS Given the OSPF configuration shown, and assuming that the OSPF adjacency between routers R1 and R3 is up, why is the 192 168.3.0/24 route not in router R3's route table? (Choose two)

B. The no-redistribute-external command is used on router R1

C. The route policy is incorrect. It should say "from protocol ISIS" rather than "from protocol direct".

D. It is not possible to be an ASBR and an NSSA. The ASBR configuration should be removed.

E. The interface between routers R1 and R3 needs to be in OSPF area 0 rather than OSPF area 1 because a backbone area must always exist.

Click on the exhibit.

What value would be expected in the state field?

A. Exchange

B. Up

C. Down

D. 2-Way

Which of the following about IS-IS level hierarchies is FALSE?

A. Level 2 routers interconnect the Level 1 areas.

B. There must be a contiguous Level 2 backbone to enable routing throughout the entire network.

C. Level 1 routers send packets to the nearest L1/L2 router if the destination is in a different area

D. Level 2 routers store the Level 1 and Level 2 topology information in a single database.

An OSPF adjacency is stuck in the exstart state. What is the most likely cause?

A. The MTU does not match on both interfaces.

B. OSPF is not enabled on one of the routers.

C. The router ID is the same on both routers.

D. An OSPF Hello has not been received from the neighbor.

E. The interfaces are configured as point-to-point on one side and broadcast on the other.

Click on the exhibit.

A service provider is deploying a 6 over 4 tunnel to connect a customer's corporate IPv6 network to all devices at the branch office as shown in the exhibit. Which command is used to create the route to the branch office network on PE1?

A. Configure router static-route 2001:DB8:1:201::/64 indirect 10.10.10.4

B. Configure router static-route 2001:DB8:1:201:764 indirect 2001:DB8:1:200::2

C. Configure router static-route 2001:DB8:1:200::/56 indirect 10.10.10.4

D. Configure router static-route 2001:DB8:1:200:756 indirect 2001:DB8:1:200::2

Click on the exhibit.

If router R2 re-distributes the IS-IS route 192.168.3.0/24 into OSPF, router R3 will receive two routes to 192.168.3.0/24. Assume that all IS-IS routers are L1/L2 capable and are in the same area.

Which of the following is TRUE?

A. Router R3 will install the OSPF route in its routing table.

B. Router R3 will install the IS-IS route in its routing table

C. Router R3 will install an OSPF route and an IS-IS route in its routing table.

D. There is not enough information to answer the question.

Click on the exhibit.

OSPF is operational on all links in the network diagram, all routers are the same cost, and all routers are configured with an ECMP value of 4. Router R5 advertises the prefix 192.168.3.0/24 into OSPF.

How many entries for prefix 192.168.3.0/24 will be in router R3's routing table?

A. 0

B. 1

C. 2

D. 3

E. 4

Click on the exhibit.

What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down?

A. Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of hello timeouts.

B. Convergence is triggered when the physical interfaces between routers R1 and R2 go down.

C. Convergence will not be triggered because switches cannot run routing protocols between them.

D. Convergence is triggered when the switches notify the routers about the link-state info.

E. Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down.