COMPUTER NETWORKING

Detailed explanation-1: -Viruses spread when the software or documents they get attached to are transferred from one computer to another using a network, a disk, file sharing methods, or through infected e-mail attachments.

Detailed explanation-2: -It only infects software files. It cannot infect files written on discs such as CD-ROM.

Detailed explanation-3: -A computer virus attaches itself to a program or file to help it spread from one computer to another. Almost all viruses are attached to an executable file, which means the virus may exist on a computer but it actually cannot infect the computer unless one runs or opens the malicious program.

Detailed explanation-4: -Yes. Anything connected to your computer that is writable, including a thumb drive, can be infected with a virus or other malware. These types of media are capable of spreading the virus to alternative drives.