osi七层模型数据报文头尾

在OSI七层模型中，数据链路层负责封装（或解封）IP数据报使之成为帧，并在相邻节点之间传输帧。数据链路层会在IP数据报加上帧头和帧尾，用于接收方的数据链路层差错检测和报文序列。 这些帧头和帧尾是数据链路层在传输过程中添加的控制信息，用于确保数据的可靠传输和完整性。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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