DCN_rpj1

DCN_rpj1 - International Institute of Information...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
1 International Institute of Information Technology NT503: Data Communication and Networking
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 NT503: Data Communication and Networking Recommended books: 1) Data communication & Networking - Behrouz A. Forouzan (2 nd or 3 rd Edition) William Stallings (6 th Edition) 3) Computer Networks – Andrew S. Tanenbaum (3 rd or 4 th Edition)
Background image of page 2
3 Overview of a data communication system What is data communication ?? Data communication is an exchange of data between two devices via some form of transmission medium (e.g. wired or wireless) Data => Information Text, images, audio, video Devices => Hardware equipment (such as PC’s, Network Interface Card – NIC, modem etc.) => Software programs (such as Network Operating system, drivers for NIC etc.)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Overview of a data communication system Effectiveness of a data communication system depends on: 1) Delivery: ¾ System must deliver data to the correct destination ¾ Data must be received by the intended user 2) Accuracy: ¾ System must deliver data accurately ¾ Data should not get altered in the transmission medium ¾ If any error occurs during transmission, it should be corrected 3) Timeliness: ¾ Real-time transmission for audio & video data ¾ No delay in transmission
Background image of page 4
5 Overview of a data communication system Topologies Network criteria Data flow Distributed processing Data representation Components of data communication system Networking Data communications Protocols & Standards
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Components of a data communication system Components of a Data communication system: 1) Message: ¾ It’s the information (or data) to be communicated ¾ Consists of Text, images, audio or video or any combination of these 2) Sender/source: ¾ It’s the device that sends the message ¾ E.g. computer, workstation, telephone, web camera, mobile phone, PDA etc. 3) Receiver/destination: ¾ It’s the device that receives the message ¾ E.g. computer, workstation, telephone, mobile phone, PDA etc.
Background image of page 6
7 Components of a data communication system 4) Transmission medium: ¾ It’s the physical path through which message travels from sender to receiver. ¾ E.g. twisted pair copper cable, Fiber optic cable, radio waves, micro waves etc. 5) Protocol: ¾ It’s a set of rules that govern data communication ¾ represents agreement between communicating devices E.g. data format, data representation etc.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 Components of a data communication system Five components of a data communication system
Background image of page 8
Data representation Data representation: 1) Text: ¾ It is represented by a bit pattern (0’s and 1’s) ¾ Process of representing symbols by bit patterns is called coding ASCII: American Standard Code for Information Interchange ¾ Uses 7 bits for each symbol ± E.g. A => , B => etc. ± hence 2
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/15/2011 for the course ECO 2023 taught by Professor Mr.raza during the Summer '10 term at FAU.

Page1 / 44

DCN_rpj1 - International Institute of Information...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online