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多項(xiàng)選擇題Which two of these are characteristics of the 802.1Q protocol?（）

A.it is a layer 2 messaging protocol which maintains vlan configurations across network.
B.it includes an 8-bit field which specifies the priority of a frame.
C.it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.
D.it modifies the 802.3 frame header,and thus requires that the FCS be recomputed.
E.it is a trunking protocol capable of carring untagged frames.

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1.單項(xiàng)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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2.多項(xiàng)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

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3.單項(xiàng)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.

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4.單項(xiàng)選擇題Which PPP subprotocol negotiates authentication options?（）

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

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5.多項(xiàng)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.

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