About tcp/ip on 51
communication protocol stack is devided by layers. tcp/ip is on top of physical layer (for example ethernet, atm, slip). tcp layer is responsiable for transpotation, ip layer is for interconnect of different network. ip layer is on top of physical layer. when in your design and implementation of protocol stack, the designer got to be clear of the concepts and implement them layer by layer is a good design method. the protocol ftp, http is on top of tcp layer, they are applications.
发表时间:2004年5月7日14:09:06