1. 1.Syntax
Format) Structure)
8 address) 8
syntax
2. Semantics
syntax
3.Timing
100 Mbps
1 Mbps
7
1. physical layer)

2. 2. data link layer)
3. network layer)
4. transport layer)
5. session layer)
6. presentation layer)
7. application layer)
TCP/IP
-
real-time Voice)
data)
FTP

3. HTTP
HTTPs
HTTP protocol
server client
Netscape 1994
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