台北科技大学：《计算机网络》（英文版） NP04 1 CONTENTS

Introduction Computer Science and Information Engineering Spring 2004 Chuan-Ming liu CS旧E.NTUT. TAWAN

CSIE, NTUT, TAIWAN 1 Introduction Computer Science and Information Engineering Spring 2004 Chuan-Ming Liu

CONTENTS A BRIEF HIISTORY PROTOCOLS AND STANDARDS STANDARDS ORGANIZATIONS INTERNETSTANDARDS INTERNETADMISTRATION CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 2 CONTENTS • A BRIEF HISTORY • PROTOCOLS AND STANDARDS • STANDARDS ORGANIZATIONS • INTERNET STANDARDS • INTERNET ADMINISTRATION

A BRIEF HISTORY CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 3 A BRIEF HISTORY 1.1

Terminologies Network Group of connected, communicating devices internet v.s. Internet two or more networks that communicate hundreds of thousands interconnected networks CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 4 Terminologies • Network Group of connected, communicating devices • internet v.s. Internet – two or more networks that communicate – hundreds of thousands interconnected networks

Time Line The following is a list of important Internet events In chronological order 1969. Four-node arpanet established 1970. ARPA hosts implement NCP 1973. Development of TCP/iP suite begins 1977. An internet tested using TcP/Ip 978.UNIX distributed to academic sites CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 5 Time Line The following is a list of important Internet events in chronological order: 1969. Four-node ARPANET established. 1970.ARPA hosts implement NCP. 1973. Development of TCP/IP suite begins. 1977.An internet tested using TCP/IP. 1978. UNIX distributed to academic sites

1981. CSNET established (NSF sponsored) 1983. TCP/IP becomes the official protocol 1983. MILNET was born 1986. NSFNET established (NSF) 1990. ARPANET replaced by NSfnet 1995. nsfnet became a research network 995.SPs started CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 6 1981. CSNET established. (NSF sponsored) 1983. TCP/IP becomes the official protocol 1983. MILNET was born. 1986. NSFNET established. (NSF) 1990.ARPANET replaced by NSFNET. 1995. NSFNET became a research network. 1995.ISPs started

F ISP Internet today oI NAP National International

CSIE, NTUT, TAIWAN 7 Figure 1-1 Internet today

12 PROTOCOLS AND STANDARDS CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 8 PROTOCOLS AND STANDARDS 1.2

Protocols and standards Protocols -rules Standards-agreed-upon rules CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 9 Protocols and Standards • Protocols – rules • Standards – agreed-upon rules

Protocols Entity Anything capable of sanding or receiving information Protocol is a set of rules that governs data communication Elements of a protocol Syntax(what Semantics(how) Timing(when) CSIE NTUT TANAN

CSIE, NTUT, TAIWAN 10 Protocols • Entity Anything capable of sanding or receiving information • Protocol is a set of rules that governs data communication • Elements of a protocol – Syntax (what) – Semantics (how) – Timing (when)