Chapter 1 – Part 3 Introduction.

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Presentation transcript:

Chapter 1 – Part 3 Introduction

Example Networks The Internet Connection-Oriented Networks: X.25, Frame Relay, and ATM Ethernet Wireless LANs: 802:11

The ARPANET (a) Structure of the telephone system. (b) Baran’s proposed distributed switching system.

The original ARPANET design. The ARPANET (2) The original ARPANET design.

The ARPANET (3) Growth of the ARPANET (a) December 1969. (b) July 1970. (c) March 1971. (d) April 1972. (e) September 1972.

NSFNET The NSFNET backbone in 1988.

Internet Usage Traditional applications (1970 – 1990) E-mail News Remote login File transfer

Architecture of the Internet Overview of the Internet.

ATM Virtual Circuits A virtual circuit.

ATM Virtual Circuits (2) An ATM cell.

The ATM Reference Model

The ATM Reference Model (2) The ATM layers and sublayers and their functions.

Architecture of the original Ethernet.

Wireless LANs (a) Wireless networking with a base station. (b) Ad hoc networking.

The range of a single radio may not cover the entire system. Wireless LANs (2) The range of a single radio may not cover the entire system.

Wireless LANs (3) A multicell 802.11 network.

Network Standardization Who’s Who in the Telecommunications World Who’s Who in the International Standards World Who’s Who in the Internet Standards World

ITU Main sectors Classes of Members Radiocommunications Telecommunications Standardization Development Classes of Members National governments Sector members Associate members Regulatory agencies

IEEE 802 Standards The 802 working groups. The important ones are marked with *. The ones marked with  are hibernating. The one marked with † gave up.

The principal metric prefixes. Metric Units The principal metric prefixes.