Which MAC protocol sets a random timer to reattempt communication?
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The MAC protocol that sets a random timer to reattempt communication is CSMA/CD, which stands for Carrier Sense Multiple Access with Collision Detection.
In CSMA/CD, multiple devices share a common transmission medium, such as a coaxial cable or an Ethernet switch. Before transmitting data, each device listens for a carrier signal on the medium to check whether another device is currently transmitting. If the medium is idle, the device can start transmitting.
However, if two devices start transmitting at the same time, a collision occurs, and both devices stop transmitting and wait for a random amount of time before attempting to retransmit their data. The random timer is used to prevent the devices from repeatedly colliding and waiting for the same amount of time, which can lead to a "traffic jam" on the network.
IEEE 802.1x is a protocol for port-based network access control, which authenticates devices before allowing them to access the network. It is not related to MAC protocol and does not set random timer for reattempt communication.
RARP (Reverse Address Resolution Protocol) is used to find the IP address of a device based on its MAC address. It is not a MAC protocol and does not set random timer for reattempt communication.
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) is a MAC protocol used in wireless networks, where collisions cannot be detected. It uses a different mechanism to avoid collisions, called virtual carrier sensing. It does not set a random timer for reattempt communication but instead waits for a clear channel before transmitting data.