The network layer has the task of moving the data through the internetwork. 网路层的任务在互连网路间移动资料。
The data link layer builds a frame around the network layer data so the necessary checks and controls can be applied. 资料链结层在网路层资料之外建立一个讯框,如此一来必要的检查和控制才能被套用。
Routers operate at the Network Layer. 路由器运行在网络层。
The IP layer supplies a checksum that includes its own header. 网络层提供包含自身报头的检查和。