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What is firewall

What is a firewall, and how does it differ from an anti-virus program?
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  1. Best answer
    Your in the wrong section for this kind of question, but heres an answer anyway.

    A firewall is a program that detects incoming and outgoing connections from your PC (whether it be too/from the internet or LAN) and compares it to a list of acceptable connections. If it doesn't come up positive, it blocks the connection. This is to prevent people/files from entering your PC or stopping unauthorized programs (such as malware) from communicating data from the computer to the internet.

    A firewall only deals with incoming/outgoing connections, once a virus enters the system, it wont attempt to destroy or contain it. That's where Anti-Virus programs come in.
  2. Best answer selected by vikas186.
  3. thank you and sorry 4 d mistake
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