Pengenalan kepada Virus Komputer

Apakah itu Virus Komputer? Seandainya anda meng'Google' perkataan seperti what is computer virus?, virus computer definition, apa itu virus komputer? maka akan keluarlah begitu banyak laman web yang dapat memberikan beberapa info tentang virus komputer itu sendiri.

Sebagai posting pertama untuk blog ini, maka penulis dengan suka hati ingin memberikan beberapa definisi virus komputer itu sendiri yang diambil secara terus daripada laman-laman sesawang seperti di bawah:

Definisi daripada Wikipedia:

A computer virus is a computer program that can copy itself and infect a computer without the permission or knowledge of the owner. The term "virus" is also commonly but erroneously used to refer to other types of malware, adware, and spyware programs that do not have the reproductive ability. A true virus can only spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive. Viruses can increase their chances of spreading to other computers by infecting files on a network file system or a file system that is accessed by another computer.^[1][2]

The term "computer virus" is sometimes used as a catch-all phrase to include all types of malware. Malware includes computer viruses, worms, trojan horses, most rootkits, spyware, dishonest adware, crimeware, and other malicious and unwanted software), including true viruses. Viruses are sometimes confused with computer worms and Trojan horses, which are technically different. A worm can exploit security vulnerabilities to spread itself to other computers without needing to be transferred as part of a host, and a Trojan horse is a program that appears harmless but has a hidden agenda. Worms and Trojans, like viruses, may cause harm to either a computer system's hosted data, functional performance, or networking throughput, when they are executed. Some viruses and other malware have symptoms noticeable to the computer user, but many are surreptitious.

Most personal computers are now connected to the Internet and to local area networks, facilitating the spread of malicious code. Today's viruses may also take advantage of network services such as the World Wide Web, e-mail, Instant Messaging, and file sharing systems to spread.

Definisi daripada Hitachi ID systems:

A Virus is a small program that embeds itself into other programs. When those other programs are executed, the virus is also executed, and attempts to copy itself into more programs. In this way, it spreads in a manner similar to a biological virus.

viruses, by definition, can "infect" any executable code. Accordingly, they are found on floppy and hard disk boot sectors, executable programs, macro languages and executable electronic mail attachments.

viruses can be found using a Virus Scanner or a Virus Wall. Some software products are also available to remove them with a minimum of harm to the "infected" files.

Some viruses are self-modifying, in order to make detection more difficult. Such viruses are called polymorphic (many shapes).

Definisi daripada About.com

Definition: In computer technology, viruses are malicious software programs, a form of malware. By definition, viruses exist on local disk drives and spread from one computer to another through sharing of "infected" files. Common methods for spreading viruses include floppy disks, FTP file transfers, and copying files between shared network drives.

Once installed on a computer, a virus may modify or remove application and system files. Some viruses render a computer inoperable; others merely display startling screen messages to unsuspecting users.

Advanced antivirus software programs exist to combat viruses. By definition, antivirus software examines the contents of local hard drives to identify patterns of data called "signatures" that match known viruses. As new viruses are built, antivirus software manufacturers update their signature definitions to match, then deliver these definitions to users via network downloads.

Jadi secara keseluruhannya dapatlah disimpulkan di sini virus adalah suatu pengaturcaraan komputer yang dapat mereplikasikan, memasuki, mengawal, menyamar, mengaburi dan juga menjangkiti sesebuah komputer tanpa kerelaan pengguna komputer itu sendiri.

Kemusnahan yang boleh diakibatkan oleh virus komputer ini bolehlah dikategorikan daripada sekecil-kecil kemusnahan seperti hanya menimbulkan gangguan seperti pranks hingga ke sebesar-besar kemusnahan sehingga boleh menyebabkan kemusnahan sesuatu organisasi dan syarikat.

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