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本文继续讨论局部网网络层协议中的载波检测型协议,着重分析了各种无碰撞协议和限制争用协议,对它们的工作过程、相互之间的内在联系、基本特征参数(吞吐量、延迟特性以及信道效率)进行了定性或定量的分析与比较,对从事计算机局部网的研制和使用的科技人员,有一定的指导意义。在局部网网络层的载波检测型协议中,人们为了克服 CSMA 协议和以太网协议的不足之处,提出了另外两类载波检测型协议:无碰撞协议和限制争用协议。我们将逐个予以讨论。
This paper goes on to discuss carrier detection protocols in local area network layer protocols. It focuses on various collision-free protocols and contention-contention protocols, analyzes their work processes, their inter-relationships, basic characteristic parameters (throughput, latency Characteristics and channel efficiency) conducted a qualitative or quantitative analysis and comparison, engaged in the development and use of computer local network of scientific and technical personnel, has some guidance. In the network-layer carrier detection protocol at the local network, in order to overcome the shortcomings of the CSMA protocol and the Ethernet protocol, two types of carrier detection protocols are proposed: a collision-free protocol and a contention-limited protocol. We will discuss it one by one.