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
Explanation:
This geographic location can be as large as an entire building or as small as a single switch
inside a wiring closet. In a geographic VLAN structure, it is typical to find 80 percent of the
traffic remote to the user (server farms and so on) and 20 percent of the traffic local to the
user (local server, printers, and so on).
Building Cisco Multilayer Switched Networks (Cisco Press) page 93
c
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A
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C.
If most of the traffic is “local”, you’d want your vlans kept local to prevent unnecessary broadcasts across the network.
Answer A is the opposite; you would want end-to-end vlans if 80 percent of your traffic was destined for internet (outside) to expand your broadcasts out to your gateways.
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