Below the socket layer is the protocol layer, which contains the actual implementation of the protocol (in this case, TCP).

套接字层下面是协议层，该层包含协议的实际实现(本例中为TCP)。

youdao

Below the socket layer is the protocol layer, which contains the actual implementation of the protocol (in this case, TCP).

套接字层下面是协议层，该层包含协议的实际实现(本例中为TCP)。

youdao