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Carrier Sense with Multi-Access networks

In a Carrier Sense Multiple Access (CSMA) network, computers connected to an Ethernet LAN use a distributed coordination scheme to manage data transmission. They determine network usage by sensing electrical activity on the cable. When the network is idle, no electrical signals are present, allowing computers to send frames freely. However, if a carrier signal is detected, each computer must pause its transmission until the current sender completes its data transfer. This process ensures efficient use of the network and collision avoidance.

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Carrier Sense with Multi-Access networks

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  1. Carrier Sense with Multi-Access networks • How Does a computer, which connected to an Ethernet LAN, "knows" whether the Ethernet cable is in use or not ? • All computers attached to an Ethernet participate in a distributed coordination • scheme call CSMA (Carrier Sense with Multi-Access networks). • The scheme uses electrical activity on the cable to determine status. • When no computer is sending a frame, the ether does not contain electrical signals. • If a carrier is present the computer must wait for the sender to finish before • proceeding.

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