COMPUTER NETWORKING

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: -Email Virus in an Attachment The most common way an email virus gets delivered is through the email attachment. Again, for better email protection against an email virus, you will need to be vigilant and do not open the attachment if it is not from someone you trust.

Detailed explanation-3: -Some viruses harm your computer by damaging programmes, deleting files or reformatting the hard drive. Others crash your system entirely, or some hackers send spam emails with viral attachments to steal your data.

Detailed explanation-4: -Sharing music, files, or photos with other users. Visiting an infected website. Opening spam email or an email attachment. Downloading free games, toolbars, media players and other system utilities. Installing mainstream software applications without thoroughly reading license agreements.