係電腦知識上,,咩係communication[緊急=]

Communication is the connection between two device (normally two computers) established and be able to exchange information/data via same protocols. Application can be email, files, voice and images.

When I was under-graduate student (8 yrs ago), industrial standard normall describe 7 layers of Networks. Recently, they change it to 4 layers of networks.

Top Layer
-------------------------------------
Application
Presentation
Session
Transport (TCP)
Network
Data Link
Physical

2006-11-08 19:27:39 補充：
維基百科http://zh.wikipedia.org/w/index.php?title=网络传输协议&variant=zh-tw

2006-11-08 19:28:15 補充：
網路傳輸協定或簡稱為通訊協定(Communications Protocol)，是指電腦通信的共同語言。現在最普及的電腦通信為網路通信，所以「通訊協定」一般都指電腦通信的通訊協定，如：TCP/IP、NetBEUI等。然而，通訊協定也存在於電腦的其他形式通信，例如：面相對象編程裡面對象之間的通信；作業系統內不同程序之間的消息，都需要有一個通訊協定，以確保傳信雙方能夠溝通無間。

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