Frame Relay

The Role of Telecommunications in profiting
Table of Contents
local body politic Networks (LANs)
MANs
From The Big Picture, we see that telecommunications provides a connection service (storm clouds) amidst nets (circles). Telecommunications provides the external connection service for joining networks across cities, provinces and countries.
Local Area Networks (LANs)
A Local Area Network is a system of computers that share resources such as disk drives, printers, selective information, processor power, fax/modem, applications, etc. They usually have distributed processing, which means that at that place are many desktop computers distributed around the network and that there is no central processor machine (mainframe).
Location: In a building or individual rooms or floors of buildings or nearby buildings. Can be campus wide worry a college or university.

MANs
A Metropolitan Area Network is a system of LANs connected throughout a urban center or metropolitan area. MANs have the requirement of using telecommunication media such as voice channels or data channels. Branch offices are connected to head offices through MANs. Examples of organizations that riding habit MANs are universities and colleges, grocery chains, and banks.
Location: Separate buildings distributed throughout a city.




WANs
A Wide Area Network is a network system connecting cities, countries, or continents in concert. Trans-Canada Pipeline has a WAN that stretches from Alberta to Ontario, because through the United States, and finally ends up in Boston. The support and control of the network resides in Calgary. WANs are connected together using one of the telecommunications media.
Location: City to city, across a country or across a continent.

Chapter 3. Data confabulation Network
Table of Contents
Performance
Consistency
Reliability
recuperation
Security
Applications
Basic Components
Data Flow
Modems
External/ intrinsic Modems
The major criteria that a data communication network moldiness meet are:
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