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Data Transmission Types
In a network data can be transmitted in two different ways, serial transmission and in parallel transmission. Serial Data Transmission – Bits are transmitted sequentially, one after the other....
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Backbone Network Components
A backbone network is a network that connects many networks in a single site. There are many backbone network components. Router – A router is a special device that enables the connection of two or...
View ArticleNetwork Protocols
A network protocol is “an agreement on how to converse”. The four most commonly used network protocols are TCP/IP, IPX/SPX, X.25 and SNA. Each protocol performs essentially the same functions, but each...
View ArticlePopular Viruses and Worm Programmes
2000 May : The VBS/Loveletter (‘ILOVEYOU’) worm appeard. As of 2004 this is the most costly virus to business, causing upwards of 10 billion dollars in damage. 2001 January : A worm strikingly similar...
View ArticleHow to Protect a Computer from Computer Viruses
There are many ways of preventing a computer from virus attack. Some of these precautions are listed below. Verbal Warning Avoiding the use of unchecked disks Avoiding the use of unauthorized or...
View ArticleMain Phases of Virus Activity
The main phases of virus generally follows are; Gains access to the system Lies dormant Propagates Virus is triggered by some event Virus Action
View ArticleMain Types of Virus
Boot Virus Boot virus infects the boot sector of the hard disk and is activated every time the computer is switched on. Once infected, the computer may fail to start properly. Usually boot viruses...
View ArticleData Representation
Computers use the two-state system to represent data. Such a two state system is referred to as a binary system. In computers these two states are denoted by the digits 0 and 1 and any such value is...
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Components of a Computer System
By considering the functions performed by various components, a computer can be represented as a collection of logical components as in Figure 1.3. The main hardware components of a modern computer...
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Free Internet Calls Using Your PC
The advancements in telecommunications industry have enhanced the capability of making calls worldwide, helping customers to make calls worldwide without any stress of cell phone bill payments, which...
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