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Wireless & Mobility · Advanced

Clear to Send-to-Self (CTS-to-Self)

A CTS frame addressed to the sender itself, used to set NAV with less overhead than RTS/CTS.

Definition

CTS-to-self is a protection mechanism used when legacy stations are present. It reserves the medium but does not solve hidden node problems because only stations near the sender hear it. It is commonly used by APs.

Exam tip

CTS-to-self is faster than RTS/CTS but does not address hidden nodes.

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