📜  CSMA/CA 和 CSMA/CD 的区别

📅  最后修改于: 2021-09-27 14:37:09             🧑  作者: Mango

先决条件 – 载波侦听多路访问 (CSMA)

CSMA/CD :
CSMA/CD 代表载波侦听多路访问/冲突检测是一种用于载波传输的网络协议。它运行在媒体访问控制层。感知共享信道忙于广播,中断广播直到信道空闲。在 CSMA/CD 中,通过来自其他站的广播侦听来检测冲突。在 CSMA/CD 中检测到冲突时,传输停止,站点发送阻塞信号,然后站点在重传之前等待随机时间上下文。

CSMA/CA:
CSMA/CA 代表载波侦听多路访问/冲突避免是一种用于载波传输的网络协议。与 CSMA/CD 一样,它也在媒体访问控制层中运行。与 CSMA/CD(碰撞后有效)不同,CSMA/CA 在碰撞前有效。

让我们看看 CSMA/CA 和 CSMA/CD 之间的区别:-

S.NO CSMA/CD CSMA/CA
1. CSMA / CD is effective after a collision. Whereas CSMA / CA is effective before a collision.
2. CSMA / CD is used in wired networks. Whereas CSMA / CA is commonly used in wireless networks.
3. It only reduces the recovery time. Whereas CSMA/ CA minimizes the possibility of collision.
4. CSMA / CD resends the data frame whenever a conflict occurs. Whereas CSMA / CA will first transmit the intent to send for data transmission.
5. CSMA / CD is used in 802.3 standard. While CSMA / CA is used in 802.11 standard.
6. It is more efficient than simple CSMA(Carrier Sense Multiple Access). While it is similar to simple CSMA(Carrier Sense Multiple Access).