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A few features about DCF:
* has an optional virtual carrier sense mechanism that exchanges short [[IEEE 802.11 RTS/CTS|Request-to-send (RTS)]] and [[RTS/CTS|Clear-to-send (CTS)]] frames between source and destination stations during the intervals between the data frame transmissions;
* includes a positive acknowledge scheme, which means that if a frame is successfully received by the destination it is addressed to, the destination needs to send an ACK frame to notify the source of the successful reception;
* it does not solve the [[Hidden node problem|hidden node]] and/or exposed terminal problem completely, it only alleviates the problem through the use of RTS and CTS, and recommends the use of a larger carrier sensing range;
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