1. Standard 802.11
The first version of the 802.11 standard dates back to 1997. In 1999, two extensions, a and b, were added .
The initial standard defines three physical layersPHY (PHYsical) and a layer for controlling access to the transmission medium MAC (Medium Access Control). One of the PHY layers uses Infra Red (IR) waves, enabling data rates of up to 2 Mbit/s. The other two layers use 2.4 GHz radio waves, one with Direct Sequence Spread Spectrum (DSSS) and the other with Frequency Hopping Spread Spectrum (FHSS), both of which enable data rates of up to 2 Mbit/s. Extensions a and b respectively define a PHY OFDM (Orthogonal Frequency Division Multiplexing) layer...
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
Standard 802.11
Network architectures
Article included in this offer
"Security of information systems"
(
88 articles
)
Updated and enriched with articles validated by our scientific committees
A set of exclusive tools to complement the resources
- (1) - - Le standard IEEE 802.11 et ses extensions a et b (disponible au téléchargement depuis http://ieee802.org/11
- (2) - - WiFi : information disponible depuis http://www.wirelessethernet.org ...
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
