Editing IEEE 802.11 (section)

===Data frames===
Data frames carry packets from web pages, files, etc. within the body.<ref name="Frame Types">{{cite web|url=http://www.wi-fiplanet.com/tutorials/article.php/1447501|title=Understanding 802.11 Frame Types|access-date=2008-12-14|url-status=dead|archive-url=https://web.archive.org/web/20081125033409/http://www.wi-fiplanet.com/tutorials/article.php/1447501|archive-date=2008-11-25}}</ref> The body begins with an [[IEEE 802.2]] header, with the Destination [[Service Access Point]] (DSAP) specifying the protocol, followed by a [[Subnetwork Access Protocol]] (SNAP) header if the DSAP is hex AA, with the [[organizationally unique identifier]] (OUI) and protocol ID (PID) fields specifying the protocol. If the OUI is all zeroes, the protocol ID field is an [[EtherType]] value.<ref>{{cite web|url=https://scm.info.ucl.ac.be/release/cnp3/Book/0.2/html/lan/lan.html#wireless-networks|archive-url=https://archive.today/20121127171405/https://scm.info.ucl.ac.be/release/cnp3/Book/0.2/html/lan/lan.html%23wireless-networks|archive-date=27 November 2012|url-status=dead|title=Computer Networking : Principles, Protocols and Practice|first=Olivier|last=Bonaventure|access-date=2012-07-09}}</ref> Almost all 802.11 data frames use 802.2 and SNAP headers, and most use an OUI of 00:00:00 and an EtherType value.

Similar to [[TCP congestion control]] on the internet, frame loss is built into the operation of 802.11. To select the correct transmission speed or [[Modulation and Coding Scheme]], a rate control algorithm may test different speeds. The actual packet loss rate of Access points varies widely for different link conditions. There are variations in the loss rate experienced on production Access points, between 10% and 80%, with 30% being a common average.<ref>{{cite conference|author1= D Murray |author2=T Koziniec |author3=M Dixon |author4=K. Lee|title=Measuring the reliability of 802.11 WiFi networks|conference=2015 Internet Technologies and Applications|year=2015|pages=233–238 |doi=10.1109/ITechA.2015.7317401|isbn=978-1-4799-8036-9 |s2cid=14997671 }}</ref> It is important to be aware that the link layer should recover these lost frames. If the sender does not receive an Acknowledgement (ACK) frame, then it will be resent.