Half-Duplex Ethernet Networks: CSMA/CA Protocol

Half-Duplex Ethernet Networks

A. CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)

• A medium access control protocol used in wireless networks
• Similar to CSMA/CD, but with modifications for wireless networks
• Uses a request-to-send (RTS) and clear-to-send (CTS) mechanism to avoid collisions
• Devices sense the channel, and if idle, send an RTS to the access point
• Access point responds with a CTS, and only then can the device transmit
• Other devices receiving the RTS and CTS packets will defer transmission

B. CSMA/CD (Carrier Sense Multiple Access with Collision Detection)

• A medium access control protocol used in half-duplex Ethernet networks
• Devices sense the channel and transmit if idle
• If two devices transmit at the same time, a collision occurs
• Devices detect collisions and immediately stop transmitting
• Devices wait a random period of time before retransmitting
• Reduces the likelihood of consecutive collisions

C. CSMA/CC (No such protocol exists)

• There is no medium access control protocol called CSMA/CC

D. CSMA/CQ (No such protocol exists)

• There is no medium access control protocol called CSMA/CQ

Half-Duplex Ethernet Networks

Medium Access Control Protocols

• A.CSMA/CA is a medium access control protocol used in wireless networks
• CSMA/CA is similar to CSMA/CD, but with modifications for wireless networks
• CSMA/CA uses a request-to-send (RTS) and clear-to-send (CTS) mechanism to avoid collisions
• In CSMA/CA, devices sense the channel, and if idle, send an RTS to the access point
• Access point responds with a CTS, and only then can the device transmit
• Other devices receiving the RTS and CTS packets will defer transmission

CSMA/CD Protocol

• CSMA/CD is a medium access control protocol used in half-duplex Ethernet networks
• Devices sense the channel and transmit if idle
• If two devices transmit at the same time, a collision occurs
• Devices detect collisions and immediately stop transmitting
• Devices wait a random period of time before retransmitting
• CSMA/CD reduces the likelihood of consecutive collisions

Non-Existent Protocols

• There is no medium access control protocol called CSMA/CC
• There is no medium access control protocol called CSMA/CQ

Learn about the Carrier Sense Multiple Access with Collision Avoidance protocol used in wireless networks, its modifications from CSMA/CD, and how it prevents collisions.