單項選擇題What is the default administrative distance of OSPF?（）

A.120
B.100
C.90
D.110


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1.單項選擇題

Refer to the exhibit. A network administrator configures a new router and enters the copy startup-config running-config on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enter the system configuration dialog as shown. What is the caust of the problem?（）

A.The network administrator faled to save the configuration.
B.The configuration register is set to 0x2100.
C.The boot system flash command is missing from the configuration.
D.The configuraiton register is set to 0x2102.
E.The router is configured with the boot system startup command.

2.多項選擇題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.

3.多項選擇題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.單項選擇題Which command can be a router to verify the layer 3 path to a host?（）

A.traceroute address
B.tracert address
C.ssh address
D.telnet address

5.單項選擇題Which command reveals the last method used to power cycle a router?（）

A.show reload
B.show boot
C.show running-config
D.show version

6.多項選擇題Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information? （）

A.the amount of available ROM
B.the amount of available flash and RAM memory
C.the version of the bootstrap software present on the router
D.show version
E.show processes
F.show running-config

7.多項選擇題

Refer to the graphic. A static route to the 10.5.6.0/24 network is to be configured on the HFD router. Which commands will accomplish this? （）

A.HFD（config）#iproute10.5.6.00.0.0.255fa0/0
B.HFD（config）#iproute10.5.6.00.0.0.25510.5.4.6
C.HFD（config）#iproute10.5.6.0255.255.255.0fa0/0
D.HFD（config）#iproute10.5.6.0255.255.255.010.5.4.6
E.HFD（config）#iproute10.5.4.60.0.0.25510.5.6.0
F.HFD（config）#iproute10.5.4.6255.255.255.010.5.6.0

9.單項選擇題Which parameter can be tuned to affect the selection of a static route as a backup.when a dynamic protocol is also being used?（）

A.link bandwidth
B.hop count
C.link cost
D.administrative distance
E.link delay

10.單項選擇題If IP routing is enabled, which two commands set the gateway of last resort to the default gateway? （）

A.ip default-gateway 0.0.0.0
B.ip route 172.16.2.1 0.0.0.0 0.0.0.0
C.ip default-network 0.0.0.0
D.ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E.ip route 0.0.0.0 0.0.0.0 172.16.2.1