多項(xiàng)選擇題Which statements describe the routing protocol OSPF? （）

A.It supports VLSM.
B.It is used to route between autonomous systems.
C.It confines network instability to one area of the network.
D.It increases routing overhead on the network.
E.It allows extensive control of routing updates.
F.It is simpler to configure than RIP v2.


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1.多項(xiàng)選擇題Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true (Choose two.)（）。

A.Router C will use ICMP to inform Host 1 that Host 2 cannot be reached
B.Router C will use ICMP to inform Router B that Host 2 cannot be reached
C.Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached
D.Router C will send a Destination Unreachable message type
E.Router C will send a Router Selection message type
F.Router C will send a Source Quench message type

2.單項(xiàng)選擇題Which IPV6 routing protocol uses multicast group FF02::8 to send updates?（）

A.RIPng
B.OSPFv3
C.IS-IS for IPv6
D.static

3.多項(xiàng)選擇題What information does a router running a link-state protocol use to build and maintain its topological database?（）

A.hello packets
B.SAP messages sent by other routers
C.LSAs from other routers
D.beacons received on point-to-point links
E.routing tables received from other link-state routers
F.TTL packets from designated routers

4.多項(xiàng)選擇題OSPF routing uses the concept of areas. What are the characteristics of OSPF areas? （）

A.Each OSPF area requires a loopback interface to be configured.
B.Areas may be assigned any number from 0 to 65535.
C.Area 0 is called the backbone area.
D.Hierarchical OSPF networks do not require multiple areas.
E.Multiple OSPF areas must connect to area 0.
F.Single area OSPF networks must be configured in area 1.

5.多項(xiàng)選擇題Which are valid modes for a switch port used as a VLAN trunk? （）

A.transparent
B.auto
C.on
D.desirable
E.blocking
F.forwarding

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