COMPUTER FUNDAMENTALS

Detailed explanation-1: -Viruses used to be spread when people shared floppy disks and other portable media, now viruses are primarily spread through email messages. Unlike worms, viruses often require some sort of user action (e.g., opening an email attachment or visiting a malicious web page) to spread.

Detailed explanation-2: -Answer. Email viruses, which constitute the majority of computer viruses, consists of malicious co de that is distributed in email messages, and it can be activated when a user clicks on a li nk in an email message, downloads an email attachment or interacts in some other way with the body of an infected email.

Detailed explanation-3: -Viruses are microscopic particles that exist almost everywhere on Earth. They are present in animals, plants, and other living organisms, and they can sometimes cause diseases. Viruses are biological entities that can only thrive and multiply in a host, which is a living organism such as a human, an animal, or a plant.

Detailed explanation-4: -Based on their host, viruses can be classified into three types, namely, animal viruses, plant viruses, and bacteriophages.

Detailed explanation-5: -The most common reason your computer will get infected is because you downloaded or installed infected files. Pirated media and free games are common culprits, and so are phishing attacks where you click on a bad link, button, or email attachment. Once clicked, the virus or other malware installs itself.