What does the 'on with threshold' setting of the RTS/CTS protocol allow?

What does the 'on with threshold' setting of the RTS/CTS protocol allow?

• A. To control which frames over a certain size are announced and cleared to send by the stations.
• B. To control the encryption algorithm used.
• C. To control the channel width.
• D. Determines retry limit.

Answer: (D)

RTS/CTS is a handshake used to avoid collisions by reserving the channel before sending a frame. The “on with threshold” option enables this handshake only for frames larger than a certain size. The practical effect is on how often a transmission must be retried: using RTS/CTS for bigger frames can reduce collisions and thus reduce the number of retries, while not using it for smaller frames means those frames may retry more often due to contention. So this setting relates to how many retries may be needed to successfully deliver a frame, by controlling when RTS/CTS is employed.

RTS/CTS is a handshake used to avoid collisions by reserving the channel before sending a frame. The “on with threshold” option enables this handshake only for frames larger than a certain size. The practical effect is on how often a transmission must be retried: using RTS/CTS for bigger frames can reduce collisions and thus reduce the number of retries, while not using it for smaller frames means those frames may retry more often due to contention. So this setting relates to how many retries may be needed to successfully deliver a frame, by controlling when RTS/CTS is employed.