How do most network-bound viruses typically spread?

Most network-bound viruses typically spread through email communication. This method is prevalent because emails can easily deliver attachments or links that, when opened or clicked on by an unsuspecting user, initiate the download and execution of malicious software. Cybercriminals often use social engineering tactics in their emails to entice users into taking action, such as clicking on an attachment that appears to be legitimate but is actually a virus.

Additionally, emails can reach a wide range of recipients rapidly, especially if they are sent to multiple addresses or if recipients inadvertently forward the infected email to others. This vast reach and the ease of exploitation make email a highly effective vector for the spread of network-bound viruses.

While other methods like instant messaging services or USB devices can also distribute malware, they are less common for network-bound viruses compared to the extensive use of emails in both personal and professional contexts. Secure file transfer protocols are designed to enhance security and mitigate the risk of virus transmission, making them less likely to be a common source of virus spread.