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10. In step 4 of the CSMA/CA protocol, a station that successfully transmits a frame begins the CSMA/CA protocol for a second frame at step 2, rather than at step 1. What rationale might the designers of CSMA/CA have had in mind by having such a station not transmit the second frame immediately (if the channel is sensed idle)?

2 Answers

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Final answer:

CSMA/CA protocol restarts from step 2 after a successful transmission to prevent the just transmitting station from dominating the channel, ensuring fairness and enhancing network efficiency and throughput by reducing collisions.

Step-by-step explanation:

In CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance), a critical network protocol used in wireless networks like Wi-Fi to manage how data packets are sent over a shared medium, there is a specific process followed to avoid collisions. When a station successfully transmits a frame and has another frame to send, it starts the process again from step 2 rather than step 1. This is because after a successful transmission, the network environment may have changed with potentially new stations wishing to transmit. Re-entering the process at step 2 forces the station to first check if the medium is idle and then wait for a random backoff time before trying to transmit again.

This design helps prevent the station that just transmitted from dominating the channel, giving other stations a fair chance to access the medium and transmit their own data. The thinking behind this is to achieve a more balanced and efficient use of the shared network resource, ensuring equitable access (fairness) and reducing the chances of consecutive collisions, thereby improving overall network efficiency and throughput.

User Yash Chavda
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2 votes

Answer:

It is done to avoid collision among the channel.

Step-by-step explanation:

CSMA/CD stands for carrier sense multiple access/collision detection.

It is a media access protocol that tells the devices how to respond when a channel is used simultaneously by two devices. The main purpose is to manage the transmission when a collision is encountered.

In the given scenario when the channel is detected idle, the station does not transmits second frame in order to avoid collision. CSMA/CD protocol is designed so that after transmission of first frame, second frame transmission is started at step 2 instead of step 1.

Following is given the flow chart that depicts the working of the protocol CSMA/CD:

I hope it will help you!

10. In step 4 of the CSMA/CA protocol, a station that successfully transmits a frame-example-1
User Rajesh Naddy
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