1.1
Dec 14, 2015
1.4
Introduction
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
1.5
1-1 DATA COMMUNICATIONS1-1 DATA COMMUNICATIONS
The term The term telecommunication ____________________telecommunication ____________________. . The word The word data ________________________________data ________________________________. . Data communicationsData communications is __________________________ is __________________________
HistorySimplified Block DiagramComponents and Data Flow
Topics discussed in this section:Topics discussed in this section:
1.6
If you will be looking at the things you do inside and outside the home, where do you use or encounter Data Communications? ?
1.17
Simplified Block Diagram of Data Communication Network
Data Terminal Equipment Data Terminal Equipment –general term that describes –general term that describes the interface equipment used at the stations to adapt the the interface equipment used at the stations to adapt the digital signals __________________________________digital signals __________________________________
Data Communications Equipment Data Communications Equipment
1.19
Data Transmission- Simplified Block Diagram of Data Communication Network
Parallel Data Transmission Parallel Data Transmission – also called parallel by bit – also called parallel by bit or serial by character.or serial by character.
Serial Data Transmission Serial Data Transmission – also called serial by bit.– also called serial by bit.
1.21
Fundamental Characteristics of Data Communications System
1.1. DeliveryDelivery
2.2. AccuracyAccuracy
3.3. TimelinessTimeliness
4.4. JitterJitter
1.22
1-2 NETWORKS1-2 NETWORKS
A A networknetwork is a set of devices (often referred to as is a set of devices (often referred to as nodesnodes) ) connected by communication connected by communication linkslinks. A node can be a . A node can be a computer, printer, or any other device capable of sending computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the and/or receiving data generated by other nodes on the network.network.
Network CriteriaPhysical StructuresNetwork ModelsCategories of NetworksInterconnection of Networks: Internetwork
Topics discussed in this section:Topics discussed in this section: