4A0-101 Online Practice Questions and Answers

Click the exhibit button.

In the IS-IS network shown, router R1 has been configured to summarize network 20.20.1.0/24 and 20.20.2.0/24 as 20.20.0.0/16. Which router's routing table will be reduced compared to the routing table before the summarization?

A. Router R1

B. Router R2

C. Routers R1 and R2

D. Router R4

Click the exhibit button.

Router R2 advertises the network 192.168.3.0/24 to router R1 via OSPF. A route policy has been constructed to discard the route on router R1; however, it is not working. What is the problem?

A. The prefix list reject should be "192.168.3.0/16 exact".

B. Router R1 should be configured as an OSPF "asbr".

C. The policy "reject" should be set for import rather than export.

D. The policy was likely not "committed" after creation.

E. This is not possible because OSPF cannot use import policies.

Click the exhibit button.

If router R2 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 preference of these two routes? Choose two answers.

A. The OSPF internal preference

B. The IS-IS Level 1 internal preference

C. The IS-IS Level 2 internal preference

D. The OSPF external preference

E. The IS-IS Level 2 external preference

F. The IS-IS Level 1 external preference

What is the default preference value for a static route in the Alcatel-Lucent 7750 SR router?

A. 0

B. 5

C. 10

D. 15

Which of the following statements regarding OSPF routing updates on a multi-access network segment is true?

A. In multi-access networks, a DR and BDR are elected only if there are more than two routers connected to the network segment.

B. In multi-access networks, a DR and BDR are elected only if the subnet masks on the router interfaces are less than /30

C. In multi-access networks, a DR and BDR are elected. To ensure resiliency, both the DR and BDR send link-state advertisements describing the network.

D. In multi-access networks, a DR and BDR are elected. The DR sends link-state advertisements describing the network.

What is the source IP address in an OSPF update?

A. 224.0.0.5

B. 224.0.0.6

C. The unicast IP address of the interface the update is being sent on.

D. The system address of the router

What is wrong with the following filter configuration from an Alcatel-Lucent 7750 SR?

RTR-B# configure filter RTR-B>config>filter# ip-filter 1 create RTR-B>config>filter>ip-filter$ entry 1 create RTR-B>config>filter>ip-filter>entry$ match src-ip 172.2.0.0/16 RTR-B>config>filter>ip-filter>entry# action drop RTR-B# configure router interface toRTR-A RTR-B>config>router>if# egress RTR-B>config>router>if>egress# filter ip 1

A. There is nothing wrong with this filter

B. The filter should be applied to the ingress and not the egress.

C. The mask cannot be a "/" value, it must be in dotted decimal.

D. All traffic is being blocked

If two routers running IS-IS protocols are exchanging Hello packets with different authentication types, which of the following statements regarding the adjacency state established between them is true?

A. Different authentication types are not possible because IS-IS only supports password authentication.

B. An adjacency will not be formed

C. The two routers negotiate the authentication type and then reach the up state.

D. Only an L2 adjacency will form, as long as both routers are L2 capable.

Click the exhibit button.

A static route has been configured on router R1 to reach the PC at 139.120.121.2. However, as shown in the exhibit, the ping fails. What is the most likely cause of the problem?

A. Router R2 does not have a route to the system address of router R1 and therefore cannot respond to the ping.

B. There is no default route configured on the PC.

C. Router R2 does not have a route configured to the PC.

D. Router R1 needs to be configured with a default route.

Click the exhibit button.

Given the topology and the route-tables shown, which of the following is most likely to be the configuration on router R1?

A. Option A

B. Option B

C. Option C

D. Option D

Which part of the NSAP address is used to indicate to the end system that a packet is to be processed by the router itself?

A. AFI

B. IDI

C. HO-DSP

D. NSEL

Which function or component of the Alcatel-Lucent 7750 SR is in charge of supporting dynamic routing protocols and constructing the routing table?

A. IOM

B. CPM

C. FIB

D. SPF

Which OSPFv3 LSA is similar to the OSPFv2 Type 5 LSA?

A. AS External

B. Inter-Area Prefix

C. Inter-Area Router

D. Intra-Area Prefix

Click on the exhibit.

Router R2 uses IS-IS to advertise the network 192.168.3.0/24 to R1. How can router R1 discard the route?

A. Use an import policy and a prefix list on router R2.

B. Use an export policy and a prefix list on router R1.

C. Use an import policy and a prefix list on router R1.

D. Router R1 cannot discard the route because IS-IS does not support import policies.

Click on the exhibit.

OSPF router R2 has both point-to-point and broadcast interfaces and it is not a DR for any interfaces. Router R2 detects the link failure between itself and router R1.

Which of the following is correct?

A. Router R2 sends an update to 224.0.0.5 on its broadcast and point-to-point interfaces. The DR does not send any updates.

B. Router R2 sends an update to 244.0.0.5 on its point-to-point interfaces. The DR sends an update to

224.0.0.6 on the broadcast network.

C. Router R2 sends an update to 224.0.0.5 out its point-to-point interfaces and an update to 224.0.0.6 out its broadcast interface. The DR sends updates to 224.0.0.5 on the broadcast network.

D. Router R2 sends an update to 224.0.0.6 out its point-to-point interfaces and an update to 224.0.0.5 out its broadcast interface. The DR sends an update to 224.0.0.6 on the broadcast networks.