Explanation

• Email is used to send and receive electronic messages over the Internet.
• It allows users to communicate instantly across the world.
• Emails can include text, documents, images, audio, and video attachments.

Additional information:

• Email stands for: Electronic Mail
• SMTP: Sending emails
• POP3: Receiving/downloading emails
• IMAP: Synchronizing emails across devices
• Email address format: username@domain.com

Last verified on 28-07-2026

Explanation

• Email stands for Electronic Mail.
• It is a method of sending and receiving digital messages through the internet.
• The term electronic mail has been used with its modern meaning since 1975.
• The shorter form E-mail became common around 1979.

Additional information:

Parts of a valid email address:

1. Email Prefix
2. Email Domain

Address: example@mail.com

1. example = Email Prefix
2. mail.com = Email Domain

Last verified on 16-06-2026

Explanation

• Metadata is information that describes or provides details about data.
• It helps users understand, organize, search, and manage data.
• Examples include a file's name, size, author, creation date, and format.
• Metadata improves data retrieval and management.
• It is widely used in databases, websites, and digital files.

Last verified on 28-07-2026

Explanation

• DSL and Broadband are Internet services used to provide Internet access.
• DSL (Digital Subscriber Line) delivers Internet through telephone lines.
• Broadband provides high-speed Internet through DSL, cable, fiber optic, or wireless technologies.

Last verified on 27-07-2026

Explanation

• A firewall’s main function is to prevent or block unauthorized access to a computer network.
• It acts as a security barrier between trusted and untrusted networks (like the internet).
• It filters incoming and outgoing network traffic based on security rules.
• It helps protect systems from hackers and unwanted access attempts.

Last verified on 10-06-2026