Which type of protocol is used in Ethernet to avoid all machines transmitting at the same time?

1. Break Down the Problem

To identify the type of protocol used in Ethernet to manage simultaneous transmissions among multiple machines, we need to focus on the relevant communication and control mechanisms that govern how devices share and access the network medium.

2. Relevant Concepts

The protocol that addresses this issue in Ethernet networks is called Carrier Sense Multiple Access with Collision Detection (CSMA/CD). This protocol is designed to prevent data collisions when multiple devices attempt to transmit data over the same network channel.

3. Analysis and Detail

• Carrier Sense: Before transmitting, each device listens to the network to check if the channel is free (i.e., no other device is transmitting).
• Multiple Access: Multiple devices can access the channel, but they must take turns based on the established rules.
• Collision Detection: If a device detects that another device is also transmitting (resulting in a collision), it immediately stops sending its data and waits for a random backoff time before attempting to retransmit.

The CSMA/CD protocol is fundamental in Ethernet to ensure orderly data transmission in a shared media environment.

4. Verify and Summarize

CSMA/CD effectively mitigates the problem of collisions in Ethernet networks, enhancing overall network efficiency and reducing the risk of data loss. This is crucial for maintaining the integrity and performance of network communications.

Final Answer

The protocol used in Ethernet to avoid all machines transmitting at the same time is Carrier Sense Multiple Access with Collision Detection (CSMA/CD).