單項選擇題Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?（）

A.redundant
B.spanned
C.provisioned
D.converged


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1.多項選擇題Which two data link layers are supported by cisco ios software for IPv6?（）

A.PPP
B.FDDI
C.Frame Relay PVC
D.NBMA
E.Frame Relay SVC

2.單項選擇題

Refer to the exhibit.Give this output for SwitchC， what should the network administrator’s next action be？（）

A.Check the trunk encapsulation mode for SwitchC’s fa0/1 port.
B.Check the duplex mode for SwitchC’s fa0/1 port.
C.Check the duplex mode for SwitchA’s fa0/2 port.
D.Check the trunk encapsulation mode for SwitchA’s fa0/2 port.

3.單項選擇題Which PPP subprotocol negotiates authentication options?（）

A.NCP
B.LCP
C.ISDN
D.DLCI
E.SLIP

4.多項選擇題

What can be determined from the line of show ip route output shown in the exhibit？（）

A. The next routing update can be expected in 35 seconds. 
B. The IP address 10.10.10.6 is configured on S0/1. 
C. The IP address 10.10.10.8 is configured on S0/1.
D. This route is using the default administrative distance. 
E. The 10.10.10.8 network is two hops away from this router.

5.多項選擇題Which three statements accurately describe layer 2 Ethernet switches?（）

A.Microsegmentation decreases the number of collisions on the network.
B.if a switch receives a frame for an unkown destination,it uses ARP to resolve the address.
C.Spanning Tree Protocol allows switches to automatically share vlan information.
D.In a properly functioning network with redundant switched paths,each switched aegment will contain one root bridge with all its ports in the forwarding state.All other switches in that broadcast domain will have only one root port.
E.Establishing vlans increases the number of broadcast domains.
F.Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.