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Which of these is designed to restrict network traffic by application and port number?

A) Anti-virus software

B) Firewall

C) NTFS permissions

D) Anti-spyware software

E) A really big network traffic light

The answer: B) Firewall

A firewall can identify and control applications and/or network traffic based on port numbers and other packet information.

Want to know more? Watch “Digital Security Techniques.”

There are a number of digital security techniques that can help protect your system from the bad guys. In this video, you’ll learn about anti-virus/anti-spyware software, firewalls, account protection, and user rights and permissions