Ch 4. Telecommunications, the Internet, Intranets, and Extranets

Channel Bandwidth

: is the rate at which data is exchanged Broadband communications are telecommunication systems that can exchange data very quickly Communications Media: are the means of delivering and receiving data or information.

Extranet

: network that links selected resources of a companys intranet with its customers, suppliers, or other business partners.

Employees

can access corporate systems from any internet- connected computer.

data packets

The internet routes over the network backbone from route to route to reach their destinations.

Search Engines

: enable you to find information on the web by specifying keywords (example: google)

Applications

are developed by: manufacturers, operators of the communications network on which they operate, third- party software developers.

TCP

The Internet: made up of computers, network hardware such as routers and fiber- optic cables, software, and the /IP protocol.

ISP

Connecting via internet service providers: a(n) is any organisation that provides internet access to people.

XML

: the key to web services.

Uniform Resource Locator

(URL): web address that specific the exact location of a web page.

LAN server

Connect via : business are typically connected to their internet at very fast data rates.

Software

that has the functionality and complexity of traditional application but does not require local installation and runs in a web browser.

HTML tags

: tell the web browser how to format text.

remote locations

Distributed processing: processing devices are placed at but are connected to each other via a network.

Server

: distributes programs and data to other computer (clients) on the network as they request them.

IP Address

: 64- bit number that identifies a computer on the internet.

single location

Centralised processing: all processing occurs in a(n) or facility.

Intranet

: internal corporate network built using internet and world wide web standards and technologies.

Telecommunications

are electronic transmission of signals for communications → medium: any material substance that carries an electronic signal to support communications between a sending and receiving device.

Internet Protocol

(IP): enables computers to route communications traffic from one network to another.

management software

Network : protects software from being copied, modified, or downloaded illegally.

Computer network

consists of communications media, devices, and software needed to connect two or more computer systems or devices

Personal area networks (PAN)

support interconnection of information technology within a range of about 33 feet

Local area network (LAN)

connect computer systems and devices within a small area (office/home)

Metropolitan area networks (MAN)

connect users and their devices in a geographical area that spans a campus or city

Wide area networks (WAN)

connect large geographic regions

Centralised processing

all processing occurs in a single location or facility

Decentralised processing

processing devices are places at various remote locations

Distributed processing

processing devices are placed at remote locations but are connected to each other via a network

Client/server Architecture

multiple computer programs are dedicated to special functions

Network Operating system (NOS)

systems software that controls the computer systems and devices on a network

Network management software

protects software from being copied, modified, or downloaded illegally

Internet Protocol (IP)

enables computers to route communications traffic from one network to another

IP Protocol

set of rules to pass packets from one host to another

IP Address

64-bit number that identifies a computer on the internet

Uniform Resource Locator (URL)

web address that specific the exact location of a web page

The Internet

made up of computers, network hardware such as routers and fiber-optic cables, software, and the TCP/IP protocol

The Web

consists of server and client software, the hypertext transfer protocol (http), and mark-up languages that combine to deliver information and services over the internet

Hyperlink

highlighted text or graphics in a web document that, when clicked, opens a new web page

Web browser

web client software such as internet explorer, firefox, and safari used to view web pages

Hypertext markup language (HTML)

standard page description language for web pages

Cascading style sheet (CSS)

markup language that defines the visual appearance of content in a web page