December 2019
Beginner
510 pages
12h 7m
English
Content preview from Networking Fundamentals
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CSMA/CA
Wi-Fi is classed as a contention-based technology. All devices on the network are vying for the attention of the access point. The access method used in Wi-Fi networks is called Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA). Let's break that down a bit to understand it better:
- Carrier sense means it listens to what is happening on the carrier, in this case, the airwaves.
- Multiple access simply means that the carrier is available to multiple devices.
- Collision avoidance means that there is a mechanism in place to avoid collisions.
With a wired connection, you can detect a collision; in a wireless network, you cannot, so you need to avoid it.
As can be seen in Figure 4.1, CSMA/CA follows a simple process of Ready To ...
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