Internet refers to the current of the world's largest, open, composed of many interconnected network of specific computer network, it USES TCP/IP protocol suite as rules of communication, and its predecessor was the ARPANET,
Three stages of the development of the Internet
From a single network ARPANET 1 ~
to Internet developmentThe tertiary structure of 2 ~ gradually built the Internet
3 ~ gradually formed a multi-level structure of ISP Internet
The RFC ~ "request comments
"The formal standards for the Internet of four stages:
1 ~ the Internet draft
2 ~ proposed standard (starting from this stage become the RFC documents)
3 ~ the draft standard
4 to Internet standards
Three kinds of exchange ways:
Circuit switching
Message switching
Packet switching