單項選擇題Which port state is introduced by Rapid-PVST?（）

A.learning
B.listening
C.discarding
D.forwarding


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1.單項選擇題

The following configuration line was added to router R1
Access-list 101 permit ip 10.25.30.00.0.0.255 any
What is the effect of this access list configuration？（）

A.ermit all packets matching the first three octets of the source address to all destinations
B.permit all packet matching the last octet of the destination address and accept all source addresses
C.permit all packet matching the host bits in the source address to all destinations
D.permit all packet from the third subnet of the network address to all destinations

4.單項選擇題Which command can be arouter 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 of the following is true regarding the use of switches and hubs for network connectivity（）。

A.Switches take less time to process frames than hubs take.
B.Switches do not forward broadcasts.
C.Hubs can filter frames.
D.Using hubs can increase the amount of bandwidth available to hosts.
E.Switches increase the number of collision domains in the network.

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