Viruses can be classified primarily on their phenotypic characteristics, core content, chemical composition, capsid structure, size, shape, genome structure and modes of replication. Some of the most common viruses are, boot sector virus. There are many characteristics of viruses, which can be discussed here, but major characteristics of viruses are as follows. A computer virus is a hidden program, which invades your computer. What are the computer viruses and its characteristics. When viruses infect the cells of their host, they may cause disease. The first viruses were spread as part of computer programs, or by hiding in. This worksheetquiz combo can help test your knowledge of computer viruses. Oct 09, 2011 but sometimes antivirus can not detect all viruses, knowing therewas ga perfect in this world except the creator. Virus writers use social engineering deceptions and exploit detailed knowledge of security vulnerabilities to initially. The study of viruses is known as virology and people who study viruses are known asvirologists.
Simply because computer viruses do not exist as organic molecules may not be suf. Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. What are the computer viruses and its characteristics answers. Computer viruses generally have the following characteristics. A virus is an infectious agent made up of nucleic acid dna or rna wrapped in a protein coat called a capsid viruses have no. These viruses could be differentiated in cell culture from the oncogenic viruses by a slightly different plaque morphology. Their size range from 250 to the 20 nm of parvoviruses. Highlanda history of computer viruses the famous trio record of the disk being infected. For example, viruses cause aids acquired immune deficiency syndrome, influenza flu, chicken pox, and the common cold.
General characteristics, structure and taxonomy of viruses 6dec2004 g. A virus might corrupt or delete data on your computer, use your e mail program to spread itself to other computers, or even erase everything on your hard disk. General characteristics of viruses microbiology icds supervisor exam kerala psc. Viruses infect and live inside the cells of living organisms. Viruses are infectious agents with both living and nonliving characteristics. Information security risks associated with computer viruses can infect computers and. Viruses may occur on almost any computer platform with enough programming capability. Here are a some list of feature that computer virus can occur. Computer viruses as artificial life school of computer science. So much so that viruses are now just the tip of the iceberg. The damages caused by viruses are also significant.
Poliovirus, rabies virus the type of disease murine leukemia virus geographic locations sendai virus, coxsackie virus their discovers epsteinbarr virus how they were originally thought to be contracted dengue virus evil spirit, influenza virus the influence of bad air combinations of the above. The term virus is derived from latin which means poison or venom. The infectious property of a virus is due to its nucleic acid. State 2 living and 2 nonliving characteristics of viruses. Definition, characteristics, and other details with. The characteristics of computer virus womrs and trojan. Computer viruses are software programs that are designed and developed to. One of the main characteristics of computer viruses is related to the fact that they are programs created by hackers that attack the code of a computer, infecting files on the computer s hard drive or its source code once the virus has been copied onto the computer, it can contaminate other computers that come into contact with the machine. Computer viruses are constantly evolving but antivirus programs that are uptodate and precautionary measures can reduce the risk of a computer virus gaining entry into a system. These can range from displaying irritating messages to deleting all the files on your computer. Different types of computer viruses computer virus. Several reports have shown that more than 90% of business users encounter viruses in their work. They can infect animals, plants, and even other microorganisms. General characteristics of viruses microbiology icds.
The characteristics of computers that have made them so powerful and universally useful are speed, accuracy, diligence, versatility and storage capacity. Computer viruses come in different forms to infect the system in different ways. Furtado flores3 1virginiamaryland regional college of veterinary medicine, virginia tech, blacksburg, virginia, usa. If all goes well with the infection, the label of the floppy is modified or created with the name c brain further marking the disk. Recent study data say that the majority of the malicious programs out there in the wild today are trojans and computer worms, with viruses having declined in numbers. A virus is made up of a dna or rna genome inside a protein shell called a capsid. Fighting computer viruses is a familiar task for every network administrator and most home users today. A file deleting virus is designed to delete critical files which are the part of operating system or data files. They attack all platforms and are written in all popular computer languages. A computer virus is one type of malware that inserts its virus code to multiply itself by altering the programs and applications. Computer viruses encyclopedia of life support systems. 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. A computer virus is a computer program that can spread across computers and networks by making copies of itself, usually without the users knowledge. A description of virus characteristics used for virus.
Learn exactly what happened in this chapter, scene, or section of viruses and what it means. Many viruses contain an external membrane called an envelope. The computer virus can infect many important records on users computer. Viruses are minimally composed of a nucleic acid genome dna or rna and a protein coat. It like people who are using the computer even unclear about the understanding of terms associated with computer virus, computer worm, trojan horse, malware, boot sector virus, web scripting virus, browser hijacker, resident virus, direct action virus, polymorphic virus, file infector virus, multipartite virus, macro virus etc.
Characteristics of computer viruses, general characteristics. In 1886, adolf meyer observed viruses in tobacco plants and the viruses were tmv tobacco mosaic virus. Distinguishing characteristics of viruses obligate intracellular parasites extreme genetic simplicity contain dna or rna replication involves disassembly and reassembly replicate by onestep growth. The 9 characteristics of the most outstanding computer viruses. As with other computer based applications, forensic science can be compromised by agents that alter or disable computers, such as computer viruses.
Virus is an ultra microscopic, infectious agent that are metabolically inert and which multiply only within the living cells. As internet connectivity grows, the ease with which computer viruses can spread also grows. Including potential destruction of operating systems and data. Viruses possess unique infective properties and thus often cause disease in host organisms. The virus may corrupt the data, access the private information, steal the cpu time, steal the hard disk space, log the keystrokes, spam the contact, and display the humorous messages and many more. They are 10 to times smaller than most bacteria, so they can pass. Computer viruses spread quickly and wreck havoc on computer systems. A virus is an infectious particle that reproduces by commandeering a host cell and using its machinery to make more viruses. But sometimes antivirus can not detect all viruses, knowing therewas ga perfect in this world except the creator. The characteristics of computer virus that is easy to why we feel and find out. This paper begins with a description of how computer viruses operate and their history, and of the various ways computer viruses are structured. A computer virus is a program or segment of executable computer code that is designed to reproduce itself in computer memory and, sometimes, to damage data. Like biological ones, computer viruses enter a host through a carrier.
The computer gets infected through the replication of malicious code. Topics youll will be tested on include different types of computer viruses and methods to. Doc the characteristics of computer virus womrs and. General characteristics, structure and taxonomy of viruses 6. This virus will attack the windows registry and change the computers windows registry in accordance with the program a virus attack. Hackers design computer viruses with malicious intent and prey on. Pdf computer virus and protection methods using lab analysis. A history of computer viruses the famous trio harold joseph highland fics, facm editorinchief emeritus it was not until the fall of 1987 that computer virus es began to command worldwide attention in the popular press as well as in the trade and technical press. These viruses include computer viruses that are intractable because having two capabilities at once. A summary of general characteristics of viruses in s viruses. Viruses can enter your computer in any number of ways, such as via an email attachment, during file downloads from the internet or even upon a visit to a contaminated web site. General characteristics of virus linkedin slideshare. They come in different shapes and structures, have different.
A computer virus contains code that has the potential to cause damage andor perform unwantedunauthorized functions. However, this paper does not cover virus prevention and scanning techniques. Virus is an ultra microscopic, infectious agent that are metabolically inert and which multiply only. A computer virus is a type of computer program that, when executed, replicates itself by modifying other computer programs and inserting its own code. There are different types of viruses and they range from being a. Pdf purpose the purpose of this paper is to discuss various types of computer viruses, along with their characteristics, working, effects on. Pdf the aim of this paper is to explore the hypothesis of a computer virus. It is now generally accepted that mdv and hvt isolates can be divided into three serotypes, which will be discussed in section 2. Computer virus fact sheet what is a computer virus. The term virus covers a wide range of computer programs that have one thing in common. A flea is a parasite to a dog and is harmful to the dog. Computer viruses from an annoyance to a serious threat.
A computer virus is a program whose purpose is to cause damage, steal data, take control, andor to spread to other software. General characteristics, structure and taxonomy of viruses. Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. Procedural computer virus enforceability computer viruses and other legal procedures, is a executable program, but it is not a complete program, but the parasite in other executable programs, so it can be to enjoy all the power program. General characteristics of viruses flashcards quizlet. If a computer is infected with boot sector virus, when the computer is turned on, the virus launches immediately and is loaded into memory, enabling it to control the computer. When this replication succeeds, the affected areas are then said to be infected with a computer virus. A computer virus, much like a flu virus, is designed to spread from host to host and has the ability to replicate itself. Pdf purpose the purpose of this paper is to discuss various types of computer viruses, along with their characteristics, working, effects on the.
He defines a virus as a piece of code with two characteristics. Computer viruses have impacted a significant number of computers worldwide. At least a partially automated capability to reproduce. The nucleic acid always contains only a single kind of nucleic acid i. Computer viruses have the ability to changes your code. A vast amount of information on these viruses has been generated over the last 15 years.
Keshav narayan pai general characteristics of virus 2. The characteristics of computer infected by virus home. The list of kinds of computer viruses and virus characteristics are the windows registry. Learn about the history, types, and features of viruses.
Oct, 2009 the list of kinds of computer viruses and virus characteristics are the windows registry. Anomaly detection looks for unexpected characteristics or actions of programs. The baltimore classification is the most commonly used for studying the system of virus classification. Technical measures against computer viruses are presented in the next section, followed by procedures and policies that limit exposure. Doc the characteristics of computer virus womrs and trojan. A powerful computer is capable of performing about 34 million simple instructions per second. Today, trends of earliest computer viruses are attempted to. The core of the viruses is made upon of nucleic acid, which is surrounded by a protein coat called capsid. An estimated 50,000 computer viruses provide a variety of effects ranging from the merely unpleasant to the catastrophic.
We conclude with a discussion of the future of computer viruses and protections against them. Topics youll will be tested on include different types. Computer viruses affect the way users and administrators trust systems. Aug 22, 2019 a computer virus is one type of malware that inserts its virus code to multiply itself by altering the programs and applications. Discuss why bacteria can be cultivated on synthetic media such as nutrient broth whereas viruses cannot. Number of viruses produced depends on type of virus, size and initial health of host cell. General characteristics of viruses biology libretexts. Viruses children puts a new game on your pc and infects it. Most dna viruses assemble in nucleus, most rna viruses develop solely in cytoplasm. Viruses are extremely small infectious agents, which are only visible under electron microscope. Mar 24, 2018 here are a some list of feature that computer virus can occur. Perfect for acing essays, tests, and quizzes, as well as for writing lesson plans. Characteristics of computer virus free software download.
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