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Home/ Questions/Q 3802
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Sneha Singh
Sneha SinghLevel 40
Asked: October 24, 20212021-10-24T18:23:25+05:30 2021-10-24T18:23:25+05:30

What Method Is Used To Manage Contention-Based Access On A Wireless Network?

What Method Is Used To Manage Contention-Based Access On A Wireless Network?
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    1. Maryam Khalid Bronze
      2022-02-02T13:20:39+05:30Added an answer on February 2, 2022 at 1:20 pm

      What method is used to manage contention-based access on a wireless network?

      • Collision detection.
      • CSMA/CA.
      • Token ring.
      • ALOHA.

      Answer: Carrier sense multiple access with a collision is used to manage contention-based access on a wireless network. While the CSMA/CD is used along with ethernet wired to manage the media contention. While the token ring ALOHA is not used for media contention.

      What do you know about CSMA/CA?

      CSMA/CA (carrier sense multiple access with collision detection) is one of the protocols of the network and act as carrier transmission which works in the layer of medium access control. On the other hand, CSMA/CD work with the collision after the coherence occurs, and CSMA/CA keeps the collision to happen.

       

      The main goal of the CSMA/CA is to make the station able to receive the signal during the collision detection from multiple stations.in the cable system when the coherence happens the energy is suddenly rising almost double the current energy and the station be able to find the collision in the signals. in the wireless connection, the rise in energy is almost 10 to 15 % of the current and the station detects the collision. this is why CSMA/CA is more suitable with a wireless connection than with a wired network.

      The strategies which are used in the CSMA/CA are described below:

      IFS:

      IFS stands for interframe space that describes when the station finds the channel not available then it can wait for a period which is known as IFS it also described the channel’s priority or frames.

      Priority is inversely proportional to the priority lower the IFS higher the priority and vice versa.

      Contention Window:

      It is defined as the time-division between the slots. a station that wants to send frames and ready chooses general slots as its waiting time.

      Acknowledgment:

      A good acknowledgment and a timeout ensure successful frame transmission.

      CSMA/CA process:

      The procedure for the CSMA/CA is described in the following:

      • If the frames are ready for transmission the station first check f the channel is free or not.
      • If the channel is busy with the broadcast, the station must wait for the broadcast to end.
      •  When the channel is free, the station should wait for the IFG (interface gap) after the station can send frames.
      • The timer needs to be set after the frames are sent.
      • The station must wait for an ACK (acknowledgment) from the receiver.
      • if the acknowledgment arrives just before the timeout expires, it is considered a successful transmission.
      • If not then the station has to wait for the back-off time and needs to restart the process.

      Pros and cons of CSMA/CA:

      Pros:

      • CSMA/CA keeps the collision to happen.
      • ACK help in a way that data does not lose unnecessarily.
      • The waste transmission does not happen due to CSMA/CA.
      • CSM/CA is mostly built for wireless connections.

      Cons:

      • The process utilizes high power during transmission.
      • It calls for long waiting times.
      • It also uses more bandwidth.
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    2. shreenidhi hegde Bronze
      2022-12-09T11:57:42+05:30Added an answer on December 9, 2022 at 11:57 am

      The simplest method to manage contention-based access on a wireless network is by using Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA). CSMA/CA is a widely used MAC layer protocol that allows multiple devices to share a single channel. The CSMA/CA technique works by sensing the medium for activity before transmitting, and then deferring transmission if activity is detected. Additionally, a random backoff algorithm is used to limit the number of collisions in the network.

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