COMPUTER NETWORKING

Detailed explanation-1: -A virus can be spread when a user opens an email attachment, runs an executable file, visits an infected website or views an infected website advertisement, known as malvertising. It can also be spread through infected removable storage devices, such as Universal Serial Bus (USB) drives.

Detailed explanation-2: -Malware can use known software vulnerabilities to infect your PC. A vulnerability is like a hole in your software that can give malware access to your PC. When you go to a website, it can try to use vulnerabilities in your web browser to infect your PC with malware.

Detailed explanation-3: -Typically, computer viruses spread through malicious online downloads, infected email attachments, or by plugging in infected hardware like an external flash drive (USB stick). Computer viruses can spread through almost any method of file sharing, as long as the virus can avoid detection by antivirus programs.

Detailed explanation-4: -Downloading infected files as email attachments, from websites or through filesharing activities. Clicking on links to malicious websites in emails, messaging apps or social network posts.

Detailed explanation-5: -True. Virus can enter a computer through an infected removable media, in this case a floppy disk.