In an 802.11 infrastructure mode cell, how can stations communicate?

A.
Every station associated with an AP can transmit directly to any station associated with the
same AP radio

B.
Every station associated with an AP can transmit directly to any station associated with any
radio on that AP

C.
Every station associated with an AP can transmit directly to that AP only

D.
Every station associated with an AP can transmit directly to any station associated with the
same SSID onthe same AP radio.

Explanation:

Student Guide Book 1 – Implementing and Troubleshooting HP Wireless Networks – Page 3-28
Infrastructure mode is the most common deployment for wireless networks. In thismode, stations
do not communicate with an AP. The AP handles all communicationamong wireless stations and
controls the security and speed parameters for thenetwork.
In addition to connecting wireless stations to each other, the AP is connected to awired network.
As the interface between the wired and the wireless network, the APreceives wireless traffic from
stations and forwards it on to the wired network.
Likewise, the AP receives and forwards traffic that is being sent from the wirednetwork to the
wireless stations.
In-cell relay mode
In-cell relay mode is more commonly called a wireless bridge or wireless distributionsystem
(WDS). When functioning in this mode, an AP connects two or more networksegments, which can
be different segments of a LAN or unconnected wirelessnetworks.
In infrastructure mode, APs simply bridge traffic to wireless stations; the wirednetwork provides the
distribution system for transmitting traffic from wireless stationsto its ultimate destination. With incell relay mode, the wireless medium becomes adistribution system as well, operating as if it were
a wired infrastructure.
Student Guide Book 2 – Implementing and Troubleshooting HP Wireless Networks – Page 7-6
The MSM APs can simultaneously support wireless mesh and wireless users’ traffic. Ifyou have a
multiple-radio AP, you should dedicate each radio to a wireless mesh orto wireless users’ traffic.
For a wireless mesh, you must also consider how many links each radio supports. Inthe example
shown, the Alternate Master supports two wireless meshes: one to themaster and one to the
slave. If the same radio provides both links, the radio must beshared, significantly reducing
throughput for both links. A better design would be todedicate
-Radio 1 to the link between the alternate master and the master

-Radio 2 to the link between the alternate master and slave
Single-radio APs can also simultaneously support a wireless mesh and wireless users.
Again, this configuration will reduce throughput because the mesh and the wirelessusers must
share the radio. Keep in mind that the radio will give the wireless meshpriority over wireless users’
traffic.