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Cisco 642-891 Exam - Composite

Questions & Answers for Cisco 642-891

Showing 1-15 of 330 Questions

Question #1 - Topic 0

Refer to the exhibit. Which two commands would both produce the output in the exhibit?
(Choose two.)

A. show standby

B. show standby group 10

C. show glbp 10

D. show glbp disabled

E. show glbp active

F. show glbp standby

Question #2 - Topic 0

Which two statements are true about RIP? (Choose two.)

A. By default, RIP interfaces will only accept and send version 1 updates.

B. By default, RIP interfaces will accept version 1 and 2 updates, but will only send version 1 updates.

C. When configured with the version 1 command, RIP interfaces will only accept and send version 1 updates.

D. When configured with the version 1 command, RIP interfaces will accept version 1 and 2 updates, but will only send version 1 updates.

E. When configured with the version 2 command, RIP interfaces will only accept version 2 updates, but will send version 1 and version 2 updates.

F. When configured with the version 2 command, RIP interfaces will accept version 1 and 2 updates, but will only send version 2 updates.

Question #3 - Topic 0

Given the following partial configuration for Router A:interface serial 0ip address 10.1.1.1
255.255.255.0encapsulation frame-relayip ospf network point-to-multipointrouter ospf
7network 10.1.1.0 0.0.0.255 area 0Which two statements are correct? (Choose two.)

A. DR/BDR elections do not take place.

B. The router is restricted to a hub and spoke topology.

C. The area 0 NBMA cloud is configured as more than one subnet.

D. OSPF neighbor statements are not necessary.

Question #4 - Topic 0

Which BGP attribute will not be advertised in routing updates to its neighboring routers?

A. weight

B. local preference

C. origin

D. AS_path

E. next hop

Question #5 - Topic 0

What is the purpose of a rendezvous point (RP)?

A. acts as a meeting place for sources and receivers of multicast traffic

B. used in PIM dense mode to create a database of all multicast sources

C. used in PIM dense and sparse mode to create a database of all multicast sources

D. acts as the designated router for a broadcast segment when multicast routing is enabled

Question #6 - Topic 0

Which three statements are correct with regard to the IEEE 802.1Q standard? (Choose
three.)

A. the packet is encapsulated with a 26 byte header and a 4 byte FCS

B. the IEEE 802.1Q frame format adds a 4 byte field to a Ethernet frame

C. the IEEE 802.1Q frame retains the original MAC destination address

D. the IEEE 802.1Q frame uses multicast destination of 0x01-00-0c-00-00

E. protocol uses point-to-point connectivity

F. protocol uses point-to-multipoint connectivity

Question #7 - Topic 0

Refer to the exhibit. Which two statements are true? (Choose two.)

A. RTB will receive only the summary address of 2.0.0.0/8.

B. RTB will receive two routes, the manual summary address of 2.1.0.0/16 and the automatic, summarized classful address of 2.0.0.0/8.

C. The summary route will be sourced from the RTA s0/0 interface in the RTA routing table.

D. The summary route will be sourced from the RTA Null0 interface in the RTA routing table.

E. The summary route will be assigned the administrative distance of 90 in the RTA routing table.

F. The summary route will be assigned the administrative distance of 5 in the RTB routing table.

Question #8 - Topic 0

Refer to the exhibit. BGP sessions are established between all autonomous systems. AS
100 receives updates about network 200.200.200.0/24 from routers R2, R3, R4, and R5
with different MED values. Which router will be chosen as a next hop to reach the network
200.200.200.0/24 if all other attributes are the same?

A. R2

B. R3

C. R4

D. R5

Question #9 - Topic 0

What will occur when a nonedge switch port that is configured for Rapid Spanning Tree
does not receive a BPDU from its neighbor for three consecutive hello time intervals?

A. RSTP information is automatically aged out.

B. The port sends a TCN to the root bridge.

C. The port moves to listening state.

D. The port becomes a normal spanning tree port.

Question #10 - Topic 0

What are three key concepts that apply when configuring the EIGRP stub routing feature in
a hub and spoke network? (Choose three.)

A. A hub router prevents routes from being advertised to the remote router.

B. Only remote routers are configured as stubs.

C. Stub routers are not queried for routes.

D. Spoke routers connected to hub routers answer the route queries for the stub router.

E. A stub router should have only EIGRP hub routers as neighbors.

F. EIGRP stub routing should be used on hub routers only.

Question #11 - Topic 0

A medium-sized network with a redundant topology that uses core and access switches is
experiencing intermittent end-station accessibility. The root bridge is on one of the core
switches. It is determined that the problem occurs during STP convergence and that
accessibility issues depend on the STP state of the individual switch port. What is the best
way to decrease STP convergence time in this situation?

A. Enable PortFast on the core switches to accelerate the choice of a new root port.

B. Enable UplinkFast on the VLAN that is having the most accessibility problems.

C. Enable UplinkFast on the wiring closet switches at the edge of the network.

D. Enable PortFast on all IOS based switches that have been configured for bridge priority.

Question #12 - Topic 0

What is the purpose of the eigrp stub configuration command?

A. to increase scalability by limiting the EIGRP query range

B. to reduce the size of the routing table by blocking the D EX (External EIGRP) routes into the EIGRP stub router

C. to reduce the convergence time by enabling the EIGRP stub router to propagate the EIGRP queries from the EIGRP hub router

D. to reduce the convergence time by enabling the EIGRP stub router to also perform query requests to the EIGRP hub router

Question #13 - Topic 0

Look at the picture.

Correct Answers:
Portland# conf t
Portland(config)# router ospf 1
Portland(config-router)# network 192.168.5.4 0.0.0.3 area 1
Portland(config-router)# area 1 stub
Portland(config-router)# end
Portland# copy run start
Indianapolis# conf t
Indianapolis(config)# router ospf 1
Indianapolis(config-router)# network 192.168.5.4 0.0.0.3 area 1
Indianapolis(config-router)# area 1 stub no-summary
Indianapolis(config-router)# end
Indianapolis# copy run start

A

Question #14 - Topic 0

Which two methods advertise internal networks to external ISPs via BGP? (Choose two.)

A. using aggregate routes

B. disabling synchronization

C. forcing the next-hop address

D. defining routes via the network statement

Question #15 - Topic 0

Which message type was added to IGMPv2?

A. heartbeat

B. join request

C. leave report

D. status report

E. membership report

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