單項選擇題Which command is used to display the collection of OSPF link states?（）

A.show ip ospf lsa database
B.show ip ospf link-state
C.show ip ospf neighbors
D.show ip ospf database


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1.多項選擇題What two things will a router do when running a distance vector routing protocol? （）

A.Send periodic updates regardless of topology changes.
B.Send entire routing table to all routers in the routing domain.
C.Use the shortest-path algorithm to the determine best path.
D.Update the routing table based on updates from their neighbors.
E.Maintain the topology of the entire network in its database.

2.單項選擇題Which command displays CPU utilization?（）

A.show protocols
B.show process
C.show system
D.show version

3.單項選擇題On corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?（）

A.a router with subinterfaces configured on the physical interface that is connected to the switch
B.a router with an IP address on the physical interface connected to the switch
C.a switch with an access link that is configured between the switches
D.a switch with a trunk link that is configured between the switches

4.單項選擇題

Refer to the exhibit. What is the meaning of the output MTU 1500 bytes?（）


A.Themaximumnumberofbytesthatcantraversethisinterfacepersecondis1500.
B.Theminimumsegmentsizethatcantraversethisinterfaceis1500bytes.
C.Theminimumpacketsizethatcantraversethisinterfaceis1500bytes.
D.Themaximumpacketsizethatcantraversethisinterfaceis1500bytes.
E.Themaximumframesizethatcantraversethisinterfaceis1500bytes.

5.單項選擇題A cisco router is booting and has just completed the POST process.It is now ready to find and load an IOS image.what function does the router perform next?（）

A.It checks the configuration register
B.It attempts to boot from a TFTP server
C.It loads the first image file in flash memory
D.It inspects the configuration file in NVRAM for boot instructions