English · Science & Technology
firewall
/ˈfaɪərˌwɔːl/
[/ˈfaɪərˌwɔːl/]
network security barrier
Advancednoun
Definition
A security system that monitors and controls network traffic to block unauthorized access.
Example
The corporate firewall blocks suspicious traffic before it can reach internal servers.
The corporate firewall blocks suspicious traffic before it can reach internal servers.
Etymology
From the physical fire-resistant wall; the networking sense dates to the late 1980s.
How & Where It’s Used
Central to cybersecurity and network administration.