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when a node is visible from a wireless access point (AP), but not from other nodes
communicating with that AP. This leads to difficulties in media access control sublayer.
IEEE 802.11 uses 802.11 RTS/CTS acknowledgment and handshake packets to partly
overcome the hidden node problem.
Figure 109 – Protection Mode Setting
1. 2.4G Interface: Go to Configuration > Wireless > Radio0 >
Advanced > Advanced Settings
5G Interface: Go to Configuration > Wireless > Radio1 > Advanced
> Advanced Settings
2. Select suitable mechanism on Protection Mode; options include:
None - no protect mechanism is used. It is the default setting.
CTS-only - also known as CTS-to-Self; AP issues a CTS frame to itself
before sending data. All clients will not transmit during the time.
RTS-CTS - AP sends a RTS frame, waits for the clients CTS frame and
then sends the data packet. It allow more robust operation, but at the
expense of additional overheads.
3. Specify frame size in byte between 0 and 2347 bytes on RTS/CTS
Threshold; 2346 is default setting.
If a frame is smaller than the RTS/CTS threshold, it will be sent by the
AP without modification. If a frame is larger than the RTS/CTS threshold,
then two frames will be sent by the AP. The first frame is an RTS (request to
send) frame. After the RTS frame is sent, the AP listens for the
corresponding CTS from the target client. Upon reception of the CTS, the
AP then sends the data frame. There are trade-offs when considering what
value you should set for the RTS/CTS threshold. Smaller values will cause
RTS to be sent more often, increasing overheads. However, the more often
RTS packets are sent, the sooner the system can recover from collisions. It
is recommended to use the default value or only minor reductions of the