However, this paper does not cover virus prevention and scanning techniques. Doc the characteristics of computer virus womrs and. But actually viruses cannot be a he or a she or big either. You will be surprised to know that computer can perform millions 1,000,000 of instructions and even more per second. It was first discovered in amoeba, in 1992, and was identified as a virus in 2003.
The infectious property of a virus is due to its nucleic acid. Learn exactly what happened in this chapter, scene, or section of viruses and what it means. Number of viruses produced depends on type of virus, size and initial health of host cell. For example, herpes viruses can be classified as a dsdna enveloped virus. A molecular genetic parasite that uses cellular systems for its own replication. The computer virus also can be spread by via disk, cd, thaudvd or flash drive or other devices. Viruses may occur on almost any computer platform with enough programming capability. The viral envelope acquired from host cell during viral replication or release. Special software is needed to examine the system and detect a virus infection. Discuss why bacteria can be cultivated on synthetic media. 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 largest known virus, called mimivirus, is so large that scientists first mistook it for a bacterium. The person who sends out the computer virus may use networking of the internet.
Stanley 1935 isolated pure crystal of tobacco mosaic viruses tmv and concluded that viruses are made of nucleoproteins. Acute lower respiratory tract infections in children is a major worldwide health. 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. A basic characteristic is nucleic acid type dna or rna and morphology, that is, the virion size, shape, and the presence or absence of an envelope. This virus will attack the windows registry and change the computers windows registry in accordance with the program a virus attack. The next section places computer viruses in context. Since dmitri ivanovsky s 1892 article describing a nonbacterial pathogen infecting tobacco plants, and the discovery of the. Therefore we must and should be carefulwhen on the move like a copy of the data etc. Computer science and engineering computer viruses matt bishop encyclopedia of life support systems eolss 2. General information about computer virus different malware types. Distinguishing characteristics of viruses obligate intracellular parasites extreme genetic simplicity contain dna or rna replication involves disassembly and reassembly replicate by onestep growth.
A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Seasonal patterns of the virus genotypes were evident, with type 41 being prevalent in late autumn and type 40 remaining prevalent yearround grimwood et al. Viruses possess unique infective properties and thus often cause disease in host organisms. A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. What are the computer viruses and its characteristics answers. As software is often designed with security features to prevent unauthorized use. 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. The basic characteristics of viruses, bacteria,fungi. Most dna viruses assemble in nucleus, most rna viruses develop solely in cytoplasm. State 2 living and 2 nonliving characteristics of viruses. The core of the viruses is made upon of nucleic acid, which is surrounded by a protein coat called capsid.
The computer virus can infect many important records on users computer. Virus is an ultra microscopic, infectious agent that are metabolically inert and which multiply only within the living cells. We also cannot say that viruses are the smallest living things or organisms, as viruses do not meet the definition of living or of an organism. General characteristics of virus linkedin slideshare. Usually the virus is contained in the form of an attachment or a link to your website address. The virus appears hexagonal under an electron microscope. A computer virus is a program that may disturb the normal working of a computer system. A computer virus is a computer program that can spread across computers and. A virus that is parasitic in a bacterium and multiplies within its host, which is destroyed when the new viruses are released.
Computer viruses from an annoyance to a serious threat. Com files, data files such as microsoft word documents or pdf files, or in the boot sector of the hosts hard drive or some combination of all of these. If this file is copied to a computer, virus is also copied to the computer. It presents other forms of rogue programs that are similar to computer viruses. A virus is a small infectious agent that replicates only inside the living cells of an organism. Characteristics of computer viruses, general characteristics. The term computer virus is widely misused and, worse, misunderstood. A file deleting virus is designed to delete critical files which are the part of operating system or data files. Viruses are placed in families on the basis of many features. Since dmitri ivanovskys 1892 article describing a nonbacterial pathogen infecting tobacco plants, and the discovery of the tobacco mosaic virus by martinus beijerinck in.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. The host range and immunological properties serotypes of the virus are also used. Wild birds, above all water fowl, in which all ha and na types occur are considered as a reservoir for influenza a viruses 16, 17. A computer virus is a piece of malicious code that adds itself to other existing programs, including operating systems. Malware is a general name for all programs that are harmful.
A computer virus is a malicious software program malware that can infect a computer by modifying or deleting data files, boot sector of a hard disk drive or causes a software program to work in an unexpected manner a computer virus resides on a host computer and can replicate itself when executed. The nucleic acid always contains only a single kind of nucleic acid i. The 9 characteristics of the most outstanding computer viruses. These entities are able to infect all forms of life, ranging from bacteria to humans, and consequently, they bring about a multitude of diseases in their host.
A terminate and stay resident tsr computer virus deposits code either in memory or on disk that can be activated without the virus executing again. Viruses a computer virus is a program, a block of executable code, which attach itself to, overwrite or otherwise replace another program in order to reproduce. Characteristics of computer virus free software download. A computer virus is one type of malware that inserts its virus code to multiply itself by altering the programs and applications. One of the most common types of computer viruses, the direct action virus, attaches to. Viruses are much smaller than prokaryotes, ranging in size from about 20300 nanometers nm, though some can be larger. A computer virus is a type of computer program that, when executed, replicates itself by. Virus attaches itself to files stored on floppy disks, usbs, email attachments and hard disks. Anatomically, viruses possess nucleic acids dna or rna which are encased within a protective protein coat. It can extend through any means of digital data exchange such as the internet emails, attachments, insecure websites, links. A virus is a submicroscopic particle that can infect living cells. The characteristics of computers that have made them so powerful and universally useful are speed, accuracy, diligence, versatility and storage capacity. A computer virus is a program whose purpose is to cause damage, steal data, take control, andor to spread to other software. 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.
Definition, characteristics, and other details with. Influenza virus as an enveloped virus is relatively vulnerable to damaging environmental impacts. Topics youll will be tested on include different types of computer viruses and methods to. The list of kinds of computer viruses and virus characteristics are the windows registry. Computer virus writers use many strategies to evade detection such as space filling. General characteristics of viruses biology libretexts. The characteristics of computer virus that is easy to why we feel and find out. Viruses may also perform other actions, like creating a backdoor for later use, damaging files, or even damaging equipment. 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 computers hard drive or its source code. Discuss why bacteria can be cultivated on synthetic media such as nutrient broth whereas viruses cannot. Jun 20, 2010 computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. Doc the characteristics of computer virus womrs and trojan. In 1886, adolf meyer observed viruses in tobacco plants and the viruses were tmv tobacco mosaic virus.
Perfect for acing essays, tests, and quizzes, as well as for writing lesson plans. Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. A computer virus is a type of computer program that, when executed, replicates itself by modifying other computer programs and inserting its own code. A summary of general characteristics of viruses in s viruses. What are the computer viruses and its characteristics. 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. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. Virus writers use social engineering deceptions and exploit detailed knowledge of security vulnerabilities to initially infect systems and. A powerful computer is capable of performing about 34 million simple instructions per second. Virus phases is the life cycle of the computer virus, described by using an analogy to biology.
Infection with adenovirus is usually acquired during childhood. General characteristics, structure and taxonomy of viruses. The computer gets infected through the replication of malicious code. Surely another computer performance than usual,because the virus is also the road on our computers. Different types of computer viruses computer virus. A virus might corrupt or delete data on your computer, use your email program to spread itself to other computers, or even erase everything on your hard disk. Pdf computer virus and protection methods using lab analysis. Computer viruses encyclopedia of life support systems. Computer viruses spread quickly and wreck havoc on computer systems. Computer viruses generally have the following characteristics. Keshav narayan pai general characteristics of virus 2. Infections with the socalled highly pathogenic subtypes h5 and h7 can occur in chickens but also other types of birds and cause the clinical. The characteristics of computer virus womrs and trojan. Oct, 2009 usually the virus is contained in the form of an attachment or a link to your website address.
It takes only few seconds for calculations that we take hours to complete. 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. While influenza b infections occur only in humans, influenza a viruses can also infect pigs and horses. Computer viruses in the computer industry have always an undefeatable all of us hit by them wall, but the general computer viruses have some of the similar characteristics. The term computer virus is used for a program that has infected some executable software and, when run, causes the virus to spread to other executables. The term virus is derived from latin which means poison or venom. A computer virus is a type of malicious software program. When this replication succeeds, the affected areas are then said to be infected with a computer virus. All kinds of personal computers such as pcs, macintoshes etc.
Mar 24, 2018 here are a some list of feature that computer virus can occur. Computer viruses come in different forms to infect the system in different ways. 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. Oct 09, 2011 characteristics of computer virus computers can not be separated from the virus, all our activitiesboth copy data, surfing the internet, as well as nancepin flash cancause the computer virus. Original folders on your computer hidden and replaced with a file virus. Hence specific characteristics of particular computer viruses, or of particular types of computer viruses, must be used. Other characteristics such as host specificity, tissue specificity, capsid shape, and special genes or enzymes may also be used to describe groups of similar viruses. Learn about the history, types, and features of viruses. The computer virus thereby violates the security policy, threatening data and the operation of the system.
Computer virus is a program that copies itself, computer virus can infect your computer and slowing down your computer. Heres one ofthe characteristics of computer virus affected. A virus might corrupt or delete data on your computer, use your email program to spread itself. A virus is a biological entity that can only reproduce within a host. The virus program has managed to access the target users computer or software, but during this stage, the virus does not take any action. Characteristics of computer virus computers can not be separated from the virus, all our activitiesboth copy data, surfing the internet, as well as nancepin flash cancause the computer virus. This worksheetquiz combo can help test your knowledge of computer viruses.
Computer virus strategies and detection methods rims, kyoto. Here are a some list of feature that computer virus can occur. Like biological ones, computer viruses enter a host through a carrier. Prior to considering other general issues of virus evolution, it is important to define some terms to be used in this book. Here one of the characteristics of the computer infected by virus. Some of the most common viruses are, boot sector virus. The aim of this paper is to explore the hypothesis of a computer virus threat, and.
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