What differences exist between VLANs in wireless and wired domains?
A.
Wireless VLANs are not effective for segmenting the available services and network permissions available to clients. Wired VLANs are effective for this purpose.
B.
Wireless VLANs are never carried in 802.11 frames that cross the wireless medium. VLAN identifiers are always carried in Ethernet frames to indicate the proper VLAN.
C.
Wireless VLANs do not always segment traffic into separate broadcast domains on the wireless medium. Wired VLANs do segment broadcast domains on the wired network.
D.
Wireless VLANs are not an effective way to utilize a single set of infrastructure equipment to provide different services to different client groups. Wired VLANs are effective for this purpose.
In wired networks, VLANs effectively segment traffic into separate broadcast domains, isolating traffic between different VLANs. However, in wireless networks, while VLANs are used to assign different SSIDs to different VLANs, the wireless medium is inherently shared. This means that, despite VLAN assignments, all wireless traffic is transmitted over the same RF medium, and clients can still hear all transmissions. Therefore, wireless VLANs do not always provide the same level of traffic segmentation as wired VLANs.
[Reference:CWDP-305 Study Guide, Chapter on Infrastructure Design – VLAN Implementation in WLANs., , ]
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