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北京郵電大學(xué)

Protocol in General

Information Network Center

Beijing University of Posts and

Telecommunications

Sept. 2013

北京郵電大學(xué)

Outline

? An overview on protocols

? Well-known protocol stacks

? Protocol mechanisms

? Protocol specification

? Protocol evaluation

? Standards

INC, BUPT

北京郵電大學(xué)

What is protocol

? a set of rules to insure the information to be

transferred between communication parties

? [a set of conventions governing the treatment and

especially the formatting of data in an electronic

communications system] defined by Webster.

– /cgi-

bin/dictionary?book=Dictionary&va=protocol

– /ebc/article?tocId=9376028&query=proto

col&ct=

? It could be implemented by hardware or software

INC, BUPT

北京郵電大學(xué)

Why using protocol

? Productivity: easy to implement by groups

? Lower cost: network resource sharing

? Compatibility: world-wide reachability

? Connectivity

? Strategic benefits

?

...

INC, BUPT

北京郵電大學(xué)

What kind of Protocols are there

? Asynchronous: Byte

– Xon/Xoff, KERMIT, Xmodem serious, ...

? Synchronous: bit/binary

– SDLC, HDLC, BSC, X.25, ISDN, …

? Layered Protocol

– OSI structure 1 ~ 7: phy ~ appl.

– TCP/IP

? Vendor specific / Standard:

– proprietary / de facto

? Computer network / Telecommunication Network

? ... INC, BUPT

總結(jié)

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