4A0-101 Online Practice Questions and Answers

Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. How many type 4 LSAs will be present in the network?

A. One.

B. One for each of the routers in area 0

C. One for each of the external routes exported by router R1.

D. Type 4 LSAs are not generated in this network topology.

Click the exhibit button.

Given the diagram below, what path will traffic follow from router R6 to router R3, and from router R3 to router R6, if IS-IS is the routing protocol? The numbers beside the links are the metrics for that link.

A. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R2-R5-R6).

B. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R4-R2-R5R6).

C. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R4-R7-R5R6).

D. Router R6 to router R3 will follow (R6-R5-R7-R4-R3). Router R3 to router R6 will follow (R3-R4-R7-R5R6).

In an OSPF environment, what must a router receive after it sends out an update?

A. The router must receive an acknowledgment

B. The router must receive a Hello

C. The router must receive a new sequence number

D. The router must receive a Link State Packet

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

What command is used on the Alcatel-Lucent 7750 SR to define the default action to be taken if a packet does not match any entry in an IP filter?

A. config>filter# default-action XXX

B. config>filter>ip-filter# default-action XXX

C. config>filter# default-mode XXX

D. config>filter>ip-filter# default-mode XXX

Click the exhibit button.

Given the diagram in the exhibit, what would be the correct static route configuration on the router on the right, if it is an Alcatel-Lucent 7750 SR?

A. config> static-route 0.0.0.0/0 next-hop 10.1.2.2

B. config>router> static-route 0.0.0.0 255.255.255.255 next-hop 10.1.2.1

C. config>router> static-route 0.0.0.0/0 next-hop 10.1.2.2

D. config>router> static-route 0 0.0 0/0 next-hop 10.1.2.1

What is the CIDR summary for the block of networks from 193.4532.0/24 to 193.45.47.0/24?

A. 193.45 32 0/20

B. 193.45.0.0/21

C. 192.45.32.0/21

D. 192.45.0.0/20

Click the exhibit button.

Assuming that the router ID of the router shown is 10.10.10.4, which of the following statements regarding the CLI output is true?

A. The router with router ID 10.10.10.5 is an ASBR.

B. The router with router ID 10.10.10.3 is an ASBR.

C. The router with router ID 10.10.10.5 originated the AS summary LSA in its own area.

D. The router with router ID 10.10.10.4 is in the same area as the router with router ID 10.10.10.5.

Which type of OSPF LSA has the following characteristics: It is flooded only within the area it originates from and can be originated by any OSPF router within the area (including non-DR routers).

A. Type 1 Router LSA

B. Type 2 Network LSA

C. Type 3 Summary LSA

D. Type 4 ASBR LSA

Which of the following about IS-IS is FALSE?

A. IS-IS uses the concept of Level 1 and Level 2 routers to implement hierarchy.

B. An IS-IS router belongs to one or more areas.

C. All Level 2 routers belong to the same area.

D. A Level 1 router forwards traffic to other areas through the nearest Level 1/2 router.