Multiple choice

Which of the following is used for security?

  1. ADSL

  2. Firewall

  3. DSL

  4. UDP

  5. Proxy server
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Firewall is used for security in networks. A firewall is a small program that protects your computer and its contents from outsiders on the internet or network. A firewall prevents unauthorised traffic to and from your computer.

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