Carrier-sense Multiple Access with Collision detection

Before you start

Objectives : You will be able to understand how LAN traffic is send and how to prevent collision in network.

Prerequisites: You have to know about collision domain in network.

Tags : Collision domain, CSMA/CD .

---

Introduction to Carrier-sense Multiple Access

Carrier-sense multiple access with collision detection (CSMA/CD) is a media sense technology used in Ethernet technology for local area networking. It uses a carrier-sensing scheme in which a transmitting station detects collisions by sensing transmissions from other stations while transmitting a frame. When this collision condition is detected, the station stops transmitting that frame, transmits a jam signal, and then waits for a random time interval before trying to resend the frame.

CSMA/CD is a modification of pure carrier-sense multiple access (CSMA). CSMA/CD is used to improve CSMA performance by terminating transmission as soon as a collision is detected, thus shortening the time required before a retry can be attempted.