Peer-Peer Network

A network of computers configured to allow certain files and folders to be shared with everyone or with selected users. Peer-to-peer networks are quite common in small offices that do not use a dedicated file server. All client versions of Windows, Mac and Linux can function as nodes in a peer-to-peer network and allow their files to be shared.

Node

any computer that is hooked up to a computer network

Modem

A device for transmitting usually digital data over telephone wires by modulating the data into an audio signal to send it and demodulating an audio signal into data to receive it.

Local Area Conector (LAN)

Typically, computers running Windows are connected to a local area network (LAN). When you install Windows, your network adapter is detected, and a local area connection is created. It appears, like all other connection types, in the Network Connections folder.

intranet

a restricted computer network; a private network created using World Wide Web software

Internet

a computer network consisting of a worldwide network of computer networks that use the TCP/IP network protocols to facilitate data transmission and exchange.

Hub

A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Hacker

a programmer who breaks into computer systems in order to steal or change or destroy information as a form of cyber-terrorism

Firewall

a security system consisting of a combination of hardware and software that limits the exposure of a computer or computer network to attack from crackers; commonly used on local area networks that are connected to the internet

Extranet

A public-private website or portal, secured or password-protected, specifically designed for selected workers in an organization and selected external partners to conduct internal business.

digital subscriber line

a generic name for digital lines that are provided by telephone companies to their local subscribers and that carry data at high speeds

Communication Channels

Medium through which a message is transmitted to its intended audience, such as print media or broadcast (electronic) media.

Client/ Server Network

Client/server describes the relationship between two computer programs in which one program, the client, makes a service request from another program, the server, which fulfills the request.

client

any computer that is hooked up to a computer network

Cable Modem

A device that uses a cable TV signal to connect a computer to the Internet. Cable modems offer download speeds of up to 56Mbps and upload speeds of up to 10Mbps.

Biometric Security Measures

The statistical study of biological phenomena.