COMPUTER NETWORKING

Detailed explanation-1: -802.11 is an amendment for including wireless access in vehicular environments (WAVE) to support Intelligent Transportation Systems (ITS). They include network communications between vehicles moving at high speed and the environment. They have a data rate of 27 Mbps and operate in 5.9 GHz band.

Detailed explanation-2: -The IEEE 802.11 wireless standard uses the carrier sense multiple access with collision avoidance (CSMA/CA) as its MAC protocol (during the distributed coordination function period). This protocol is an adaptation of the CSMA/CD of the wired networks.

Detailed explanation-3: -Therefore, 802.11 cannot detect collisions the way that wired Ethernet does using CSMA/CD’s collision detection. Rather, 802.11 employs collision avoidance techniques, which, in essence, require the radio to listen before talking.