Firewall
/ˈfaɪərwɔːl/
Definition
A security system controlling network traffic based on rules — blocking or allowing connections between systems.
Example in context
"The firewall only allows inbound traffic on ports 80 and 443 — all other ports are blocked at the network level."
Related terms
Practice this term
Master Firewall in context by working through exercises in the Networking & Protocols module. You'll see the term used in real engineering scenarios with multiple-choice, fill-in-the-blank, and matching drills.