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Network Topology

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                                                                   Network Topology A network topology refers to the layout of the computers and devices in communications network. Two types of network topology:   Physical topology :   The arrangement of cabling.  Logical topology   :   T he path that data travels between computers on a network.                                                                                                                    Different between bus, star and ring...
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INTERNET SERVICE

INTERNET SERVICES Types of internet service: World Wide Web (www) E-mail Instant Messaging Voice Over Internet Protocol (VolP) Message Board File Transfer Protocol 1. World wide web- consists of a worldwide collection of electronic documents.Each electronic documents on the web  is called a web page which can contain text, graphics,animation,audio, and video.Web pages usually have built in connections to other documents. 2. E-mail- short for electronic mail.Transmission of messages and files via a computer network.An e-mail address is a unique name that consits of a user name that identities the user. Example : amir@gmail.com 3. Instant Messaging- A real time comunication service that notifies you when one or more people are online and allows you to exchange messages or files or join a private chat room with them.   Popular IM software includes:  AIM (AOL Instant Messenger)  Google Talk  MySpace IM  Windows Live Messenger Y...
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security measures

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Definition of security measures: The precautionary measures taken toward possible danger or damage. Explanation : Data backup A data backup is the result of copying or archiving files and folders for the purpose of being able to restore them in case of data loss. Data loss can be caused by many things ranging from computer viruses, hardware failures, file corruption, system failure or theft.  If you are responsible for business data, a loss may involve critical financial, customer, and company data.  If the data is on a personal computer, you could lose financial data and other key files, pictures, music and others that would be hard to replace. Cryptography Anti-virus Anti-virus software is a program or set of programs that are designed to prevent, search for, detect and remove software viruses and other malicious software like worms, Trojan horses, adware and more. If and when a virus is detected, the computer displays a warning asking what act...
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