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+

-### 1. 传输时延 +### 1. 排队时延 + +分组在路由器的输入队列和输出队列中排队等待的时间,取决于网络当前的通信量。 + +### 2. 处理时延 + +主机或路由器收到分组时进行处理所需要的时间,例如分析首部、从分组中提取数据、进行差错检验或查找适当的路由等。 + +### 3. 传输时延 主机或路由器传输数据帧所需要的时间。 @@ -105,7 +113,7 @@ 其中 l 表示数据帧的长度,v 表示传输速率。 -### 2. 传播时延 +### 4. 传播时延 电磁波在信道中传播所需要花费的时间,电磁波传播的速度接近光速。 @@ -113,14 +121,6 @@ 其中 l 表示信道长度,v 表示电磁波在信道上的传播速度。 -### 3. 处理时延 - -主机或路由器收到分组时进行处理所需要的时间,例如分析首部、从分组中提取数据、进行差错检验或查找适当的路由等。 - -### 4. 排队时延 - -分组在路由器的输入队列和输出队列中排队等待的时间,取决于网络当前的通信量。 - ## 计算机网络体系结构