What Is Computer Virus And Its Types Pdf


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01.05.2021 at 16:08
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what is computer virus and its types pdf

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Secure your endpoints and servers with industry-leading protection, detection, and response solutions. A computer virus is malware attached to another program such as a document , which can replicate and spread after an initial execution on a target system where human interaction is required. Many viruses are harmful and can destroy data, slow down system resources, and log keystrokes. Cybersecurity Basics. Computer virus.

A computer virus is a malicious piece of computer code designed to spread from device to device. A subset of malware, these self-copying threats are usually designed to damage a device or steal data. Think of a biological virus — the kind that makes you sick. A computer virus is very similar. Designed to replicate relentlessly, computer viruses infect your programs and files, alter the way your computer operates or stop it from working altogether. Some computer viruses are programmed to harm your computer by damaging programs, deleting files, or reformatting the hard drive.

What is a computer virus?

The purpose of this paper is to discuss various types of computer viruses, along with their characteristics, working, effects on the computer systems and to suggest measures for detecting the virus infection in a computer system and to elaborate means of prevention. The author undertook an extensive study and review of the literature available online and on relevant web sites on the present topic. A large number of viruses were found during the study, which are causing serious damages to computer systems. The author suggests ways to detect and prevent the different computer viruses. The research is based on and limited to the study of the relevant literature available on different relevant web sites. The research will benefit business organizations, business houses, educational institutions and libraries working in fully computerized environments, in detection of viruses and preventing infection of their computer systems.

Computer virus

Computer viruses are a lot like biological ones. Once they find a suitable host, they can replicate themselves and spread their disease to others. Both types prey on weakened defense systems and the best way to fight them off is to render them non-infective and then build up immunity. For computers, the best way to do this is to periodically replace outdated antivirus software. To date, computer engineers have identified three major types of viruses, which can be further divided into many separate subcategories.

The Three Major Types of Computer Viruses

An introduction to computer viruses: problems and solutions

A computer virus [1] is a type of computer program that, when executed, replicates itself by modifying other computer programs and inserting its own code. Computer viruses generally require a host program. When the program runs, the written virus program is executed first, causing infection and damage. A computer worm does not need a host program, as it is an independent program or code chunk. Therefore, it is not restricted by the host program , but can run independently and actively carry out attacks.

A computer virus is not that different from a real-life virus like, say, the flu. When contracted, they can both remain dormant in the system only to become active when you least expect them to. If you detect the threat early and take appropriate measures on time, you will be able to keep the symptoms under control and recover very quickly. Left untreated, however, not only can viruses spread to others but they can also wreak havoc on the health and wellbeing of their host.


PDF | Purpose – The purpose of this paper is to discuss various types of computer viruses, about the different types of computer viruses and the measures of prevention of infection. its application and this virus affects so.


How does a computer virus operate?

A computer virus, much like a flu virus, is designed to spread from host to host and has the ability to replicate itself. Similarly, in the same way that flu viruses cannot reproduce without a host cell, computer viruses cannot reproduce and spread without programming such as a file or document. In more technical terms, a computer virus is a type of malicious code or program written to alter the way a computer operates and is designed to spread from one computer to another. A virus operates by inserting or attaching itself to a legitimate program or document that supports macros in order to execute its code. In the process, a virus has the potential to cause unexpected or damaging effects, such as harming the system software by corrupting or destroying data. Once a virus has successfully attached to a program, file, or document, the virus will lie dormant until circumstances cause the computer or device to execute its code. In order for a virus to infect your computer, you have to run the infected program, which in turn causes the virus code to be executed.

People tend to play fast and loose with security terminology. However, it's important to get your malware classifications straight because knowing how various types of malware spread is vital to containing and removing them.

Secure Sockets Layer SSL is a protocol developed by Netscape for establishing an encrypted link between a web server and a browser. SSL is an industry standard which transmits private data securely over the Internet by encrypting it. It is used by many websites to protect the online transactions of their customers.

4 Comments

Balbino A.
01.05.2021 at 19:22 - Reply

DEFINITION: A COMPUTER VIRUS IS A COMPUTER PROGRAM THAT CAN COPY ITSELF, IN ANOTHER WORD WE CAN SAY THAT VIRUS IS ATTACHES ITSELF TO A PROGRAM AND PROPAGATES COPIES OF ITSELF TO OTHER PROGRAM. TYPES 1. PARASITIC VIRUS: THE TRADITIONAL AND STILL MOST COMMON FROM OF VIRUS.

Emmanuel G.
04.05.2021 at 22:45 - Reply

Keywords Computer science, computer virus, throughout the A trojan horse might install a virus as its in- virus. There are some other types of viruses which​.

Travis D.
07.05.2021 at 09:28 - Reply

Types of Computer Viruses · Boot Sector Virus – This type of virus infects the master boot record and it is challenging and a complex task to.

Kristine Z.
09.05.2021 at 22:29 - Reply

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