The best defense against unauthorized access to systems over the Internet is a firewall,which is hardware and software that blocks access to computing resources.

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A firewall is a well-known security measure that helps in blocking unauthorized access to a network or a computer system from the internet. It is a combination of hardware and software that limits access to computing resources, which in turn prevents hackers, unauthorized persons, or malicious programs from entering the system.

The Best Defense Against Unauthorized Access to Systems Over the Internet