2 Protocol)

3

o Syntax Format) Structure)

8

address) 8

syntax

o Semantics

syntax

o Timing

100 Mbps

1 Mbps

Standard)

International Organization for Standardization (ISO)

7

1. physical

layer)

2. data link

layer)

node) 2

3. network layer)

4. transport

layer)

5. session

layer)

module)

6. presentation

layer)

7. application

layer)

TCP/IP, FTP,

HTTP HTTPs

TCP/IP (Transmission Control Protocol/Internet

Protocol)

1960

ARPANET

TCP/IP

real-time

Voice) data)

TCP/IP

Header Header

Encapsulate

Header

Demultiplexing

Encapsulation/Demultiplexing

TCP/IP 4

4. Host-to-network)

IP

5. The Internet Layer)

packet-switching

network)

Connectionless)

Packet)

6. Transport Layer)

2

Transmission Control Protocol (TCP)

connection-oriented)

Byte stream

message

message

TCP

UDP (User Datagram Protocol)

connectionless)

client/server system)

request/reply)

voice)

7. Application Layer)

TELN

ET FTP

SMTP

FTP (File Transfer Protocal)

FTP

FTP USER) User

Interface FTP

FTP PI (Protocol

Interpreter module)

DT (Data

Transfer module) PI

DT

HTTP(Hyper Text Transport Protocol)

HTTP

end-user)

HTTPs(Hypertext Transfer Protocol

Security )

HTTP protocol

server client

Netscape 1994

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