Data   Communications  Principles

2 days

Introduction
This section aims to lay the foundation of the course by introducing the basic concepts behind data communications. This includes definitions of bit, baud, binary code and both asynchronous and synchronous transmission.

Interfaces
Introduces the standards and principles behind data interfaces. Includes overviews of physical, electrical and functional interfaces, RJ45 and Optical cable. The concept of flow control is reviewed.

Analogue Transmission
Reviews the basic analogue transmission methods, including Digital/Analogue conversion and modem standards for data transmission over the PSTN.

Digital Transmission
Outlines the features of digital transmission, including the concepts of Pulse Code Modulation, Time Division Multiplexing, the 2.048 Mbit Frame, Plesiochronous Digital Hierarchy (PDH) and Synchronous Digital Hierarchy (SDH).

Communications Protocols
Introduces the features and functions of protocols and how they relate to the OSI 7 layer model.

Local Area Networks
Defines the concept of a Local Area Network and outlines some of the principles involved with LANs. Includes overviews of CSMA/CD, Bridges, Switches, Spanning Tree and Routers.

Packet Technology (X.25)
Outlines the concept of Packet Technology and uses the X.25 protocol as an example. Includes an overview of the layer 2 protocol HDLC and how Packet Switches operate by using tables to route Virtual Circuits.

WANs
Reviews development of Wide Area Networking technology and features key protocols used for WAN transmissions - including ISDN, Frame Relay, ATM, Broadband and IP.

The Internet
The final section overviews the Internet and in particular IP Addressing, TCP/IP and DNS.