多项选择题

Which of the following statements is true about the 80/20 rule （Select all that apply）？（）

A.20 percent of the traffic on a network segment should be local.
B.no more than 20 percent of the network traffic should be able to move across a backbone.
C.no more than 80 percent of the network traffic should be able to move across a backbone.
D.80 percent of the traffic on a network segment should be local.

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多项选择题

What are some virtues of implementing end-to-end VLANs？（）

A.End-to-end VLANs are easy to manage.
B.Users are grouped into VLANs independent of a physical location.
C.Each VLAN has a common set of security and resource requirements for all members.
D.Resources are restricted to a single location.

单项选择题

Under what circumstances should an administrator prefer local VLANs over end-to-end VLANs？（）

A.Eighty percent of traffic on the network is destined for Internet sites.
B.There are common sets of traffic filtering requirements for workgroups located in multiple buildings.
C.Eighty percent of a workgroup’s traffic is to the workgroup’s own local server.
D.Users are grouped into VLANs independent of physical location.
E.None of the other alternatives apply

单项选择题

If you needed to transport traffic coming from multiple VLANs （connected between switches）， and your CTO was insistent on using an open standard，which protocol would you use？（）

A.802.11B
B.spanning-tree
C.802.1Q
D.ISL
E.VTP
F.Q.921