Chapter 1: Overview Lecturer: Alias Mohd Telecommunications Department Faculty of Electrical Engineering UTM SET 4573: Data Communication and Switching.

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Presentation transcript:

Chapter 1: Overview Lecturer: Alias Mohd Telecommunications Department Faculty of Electrical Engineering UTM SET 4573: Data Communication and Switching System

Issues in Data Communication Network Current trends – Data traffic grows at a very high rate – Fast development of new services – Advances in data communication technologies Current requirements – High speed data communication networks – Integration of different data communication networks (Internet) – Communication over the Internet (e-commerce, social networking, etc.)

Data Communication Model Source SystemDestination System Block diagram for Data Communication Model Source Transmitter Transmission System Transmission System Receiver Destination

Data Communication Tasks Transmission and switching system Interfacing Data and signal generation Data synchronization and exchange management Error detection, correction and recovery Flow Control Addressing Routing Message formatting Security Network management

Transmission System Transmission line is the basic building block Short distance transmisison – Twisted pair – Coaxial cable – WiFi Long distance transmission – Fiber optic – Satellite Switching system and Networking

Network Communication System Interconnection is required to interconnect a number of computers and servers Communication technologies using multimedia (voice, data, image and video) Categories of Data Communication Network – Local Area Network (LAN) – Wide Area Network (WAN)

Local Area Network (LAN) Cover a small geographical area Private owned and managed High speed network Based on packet switching network – Wired network – Wireless network

Wide Area Network (LAN) Cover a large geographical area Public network Use public carrier system Based on the following technologies – Circuit switching network – Packet switching network Also known as Telecommunication Network

Telecommunication Networks Circuit-switched Network Time Division Multiplexing Frequency Division Multiplexing Packet-switched Network Virtual ChannelDatagram

Circuit Switching Uses dedicated communication paths Consists of physical links or circuits Uses dedicated logical channels Normally for voice network – Telephone network

Packet Switching Uses packets in sending data No dedicated path is required to send the packets Packets are passed from one network to another Normally for computer to computer communication – Local area network (LAN) – Internet

Internet Interconnection of a large number of networks Based on Transmission Control Protocol/Internet Protocol (TCP/IP) The basis for a wide range of services provided to users

Internet Architecture