單項(xiàng)選擇題What kind of packets does OSPF send to keep up connectivity with its neighboring routers?()

A. SPF packets
B. hello packets
C. keepalive packets
D. dead interval packets
E. LSU packets


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1.多項(xiàng)選擇題What kind of information does a router running a link-state routing protocol need to create and maintain its topological database?()

A. LSAs from other routers
B. Beacons received on point-to-point links
C. hello packets
D. Routing tables received from neighbors
E. SAP packets sent by other routers
F. TTL packets from exclusive routers

2.單項(xiàng)選擇題In a point-to point network, which address are OSPF hello packets sent to?()

A.127.0.0.1
B.192.168.0.5
C.223.0.0.1
D.172.16.0.1
E.224.0.0.5
F.254.255.255.255.255

3.單項(xiàng)選擇題The Testking router is running both RIP and IGRP, and the same route is learned by this router from both of these methods. However, when you issue the command"show ip route" you see only the IGRP route, and not the RIP route. Why is this?()

A. IGRP has a faster update timer.
B. IGRP has a lower administrative distance.
C. RIP has a higher metric value for that route.
D. The IGRP route has fewer hops.
E. The RIP path has a routing loop.

4.單項(xiàng)選擇題Which one of the following answer choices below is true regarding the OSPF topology database?()

A. All entries in the topology database will be included on each router.
B. All routers in the same OSPF area will have one topology database.
C. The Dijkstra algorithm is used in the creation of the topology database.
D. LSA packets are used to update and maintain the topology database.

5.多項(xiàng)選擇題What are two characteristics of the OSPF process identifier?()

A. It is needed to identify a unique instance of an OSPF database.
B. It is an optional parameter only necessary if multiple OSPF processes are used.
C. It is locally significant.
D. It is globally insignificant
E. All routers in the same OSPF area must have the same process ID to exchange routing information.

6.多項(xiàng)選擇題Which two of the following are valid characteristics of EIGRP?()

A. Has a maximum hop count of 25
B. Can differentiate between internal and external routes
C. Uses a 32-bit metric
D. Can maintain only one routing table
E. Need all networks to use the same subnet mask
F. Supports only one routed protocol

7.單項(xiàng)選擇題By default, how often does a router running IGRP send its complete routing table to its neighbors?()

A. Every 5 minutes
B. Every 90 seconds
C. Every 60 seconds
D. Every 30 seconds

8.單項(xiàng)選擇題On what kinds of networks does OSPF elect a backup designated router?()

A. Point-to-point and point-to-multipoint networks
B. Nonbroadcast and broadcast multipoint multicasting
C. Point-to-point and multi-access broadcasting
D. Point-to-multipoint and multi-access broadcasting
E. Nonbroadcast and broadcast multi-access

9.多項(xiàng)選擇題Which of the following are characteristics of OSPF areas?()

A. Hierarchical OSPF networks need to be in one area
B. Multiple OSPF areas must connect to area 0
C. Single area OSPF networks must be configured in area 1
D. Areas can be assigned any number from 0 to 63535
E. Area 0 is called the backbone area
F. Each OSPF area need to be configured with a loopback interface

10.多項(xiàng)選擇題What are some of the characteristics of the OSPF routing protocol?()

A. It confines network instability to a single area of network.
B. It increases the routing overhead of the network
C. It supports VLSM
D. It routes between Autonomous Systems.
E. It allows extensive control of routing updates
F. None of the above

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