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telecommunications

the electronic transmission of signals for communications

telecommunications medium

anything that carries an electronic signal and interfaces between a sending device and a receiving device.

modum

modulation and demodulation

bandwidth

capacity of networks and telecommunications; has to do with speed

broadband

high capacity needed for video and audio

guided media

(conducted)
-use conductor to move signal
-things can touch such as a coaxable cable
-signal travels along a known confined path

hubs

a place of convergence where data arrives

wireless technologies

bluetooth, RFID, wifi, Wimax ( can cover over 3,000 miles)

centralized

all data maintained in one location (risky)

decentralized

each server is independent

distribution

applications are split between servers

Terminal-to-host

application and database reside on one computer, and use "dumb" terminal

file server

one host computer

client/ server architectures

multiple computer platforms are dedicated to special functions

Local Area Network (LAN)

covers a small area like between small buildings; 10-100 billion Mbps

Metropolitan Area Network (MAN)

connects LAN's; 30 or more miles; 100-1000 Mbps

Wide Area Network (WAN)

connects MAN and LAN and are usually leased
-span hundred of thousand of miles

Backbone Network

High speed backbone of all networks- 100 meters to many miles

A

the only one that is not backward compatable
- less interference
- increased wireless network

Switches

a telecom. device that routes incoming data from any one of the many inputs

Routers

software in a computer that determines the next network point

gateways

network point that acts as an entrance

HTML

hyperlink Markup Language

Content streaming

method for transferring multimedia files over the internet

e- commerce

is means to manage business communications

EDI

electronic data interchange: and intracompany, application to to application communication of data

M- commerce

) relies on the use of wireless devices, such as personal digital assistants, cell phones, and smart phones, to place orders and conduct business

Wireless Application Protocol( WAP)

A standard set of specifications for Internet applications that run on handheld, wireless devices.

electronic exchange

an electronic forum where manufacturers, suppliers, and competitors buy and sell goods

Transaction Processing systems (TPS)

the basic series of computer programs used by most businesses. These systems provide the basic data to carry out business
Process the detailed data necessary to update records about the fundamental business operations
Include order entry, inventory control, payroll, accounts payable, accounts receivable, and the general ledger.

Batch Processing system

method of computerized processing in which business transactions are accumulated over a period of time and prepared for processing as a single unit or batch

OLTP

computerized processing in which each transaction is processed immediately, without the delay of accumulating transactions into a batch

TPS activities

Data collection: process of capturing and gathering all data necessary to complete transactions
Data editing: process of checking data for validity and completeness
Data correction: process of reentering miskeyed or misscanned data that was found during data editing
Data manipulation: process of performing calculations and other data transformations related to business transactions
Data Storage: process of updating one or more databases with new transactions
Document production and reports: process of generating profit records and reports

Business continuity planning

identification of the business processes that must be restored first in a disaster event

international issues

- different language and culture
- disparities in IS infrastructure
- varying laws and custom rules

ERP

) systems are used in large, midsized, and small companies
Real-time monitoring of business functions
Timely analysis of key issues, such as quality, availability, customer satisfaction, performance, and profitability

ERP Disadvantages

Expense and time in implementation
Difficulty implementing change
Difficulty integrating with other systems
Risks in using one vendor
Risk of implementation failure

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