Here are the explanations for the terms: • Backup: A copy of data made to prevent data loss in case of a primary data failure. Example: Saving important documents from your computer to an external hard drive. • Scanned: The process of converting a physical document or image into a digital format using a scanner. Example: Using a flatbed scanner to turn a paper photograph into a JPEG file on your computer. • Firewall: A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks. Example: A software firewall on your computer blocking unauthorized access attempts from the internet. • Download: The process of receiving data from a remote system, such as a server, to a local system, such as your computer or phone. Example: Saving a song from a music website to your computer. • Email attachment: A file sent along with an email message. Example: Sending a resume document or a photo as an attachment in an email. • Antivirus: Software designed to detect, prevent, and remove malicious software, such as viruses, worms, and Trojans, from a computer system. Example: Running an antivirus scan on your computer to find and remove malware.