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问题

How could the Ezonexam corporation benefit from using VLANs on their network?

(Select three answer choices.)

A. VLANs allow access to network services based on department, not physical location.

B. VLANs utilize packet filtering to enhance network security.

C. VLANs provide a low-latency, high bandwidth internetworking alternative.

D. VLANs provide a method of communication between IP addresses in large networks.

E. VLANs establish segmented broadcast domains in switched networks.

F. VLANs can greatly simplify adding, moving, or changing hosts on the network.

参考答案
正确答案:AEF
A,E,F 解析:Explanation:
VLANs establish broadcast domains in switched networks, so by virtue of having the option to create many efficient broadcast domains, congestion is reduced and network throughput is greatly enhanced. VLANs allow networks to be divided by department or resource needs, rather then by physical location. When people move departments, leave a department, or join a department, administration is easy and convenient with a few keystrokes.

Incorrect Answers:
B, D. These would be router functions at layer 3. Switches and VLANs operate at layer 2 of the OSI model.

C. The use of VLANs may actually increase the latency in some cases, as traffic from one VLAN to the other will need to be routed.
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