Computer viruses cannot be spread through "operators carrying infectious diseases." A computer virus is a computer program. The program belongs to data, and the transmission of data (virus) must pass through the transmission medium (floppy disk, CD-ROM, network, etc.). Without the transmission medium, the virus cannot spread.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Related recommendations: "Programming Learning"
Computer viruses cannot be spread through ().
A． Network
B． Floppy disk
C． Operators carrying infectious diseases
D． CD
Correct answer: C
Answer analysis
[Test point] Computer virus prevention
[Analysis ] Computer viruses are usually transmitted from floppy disks, CD-ROMs and the Internet. Computer viruses cannot be spread by operators carrying infectious diseases.
Extended information:
Computer virus (Computer Virus) is a code inserted by the compiler into a computer program that destroys computer functions or data. It can affect the use of the computer and can A self-replicating set of computer instructions or program code.
Computer viruses are contagious, covert, infectious, latent, excitable, expressive or destructive. The life cycle of a computer virus: development period → infection period → incubation period → attack period → discovery period → digestion period → extinction period.
How computer viruses spread:
Computer viruses have their own transmission modes and different transmission paths. The main function of the computer itself is its own replication and propagation, which means that computer viruses can spread very easily, and viruses can usually be spread in an environment where data can be exchanged. There are three main types of computer virus transmission methods:
(1) Virus transmission through mobile storage devices: U disks, CDs, floppy disks, mobile hard disks, etc. can all be paths for spreading viruses, and because they often Being moved and used, they are more likely to be favored by computer viruses and become carriers of computer viruses.
(2) Spread through the Internet: The network methods described here are also different. Web pages, emails, QQ, BBS, etc. can all be ways for computer viruses to spread online. Especially in recent years, with the advent of network technology, With the development of the Internet and the operating frequency of the Internet, the speed of computer viruses is getting faster and faster, and their scope is gradually expanding.
(3) Spread by exploiting the weaknesses of computer systems and application software: In recent years, more and more computer viruses have spread by exploiting the deficiencies of application systems and software applications. Therefore, this approach is also classified as a basic category of computer viruses. in the mode of communication.
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