Glossary: Security+ Exam Prep 2: Performance-Based Questions

firewall

Also written: network firewall, rule table

A device that allows or denies traffic between networks using an ordered rule table, matching on address, port and protocol. It usually sits at the network edge.

Where the book teaches it

Chapter 1: How Performance-Based Questions Work
Chapter 4: Domain 3 Tasks: Architecture and Data
Chapter 5: Domain 4 Tasks: Firewalls, Scans and Automation
Chapter 8: Practice Tasks

Related terms

ACL (access control list)first match implicit deny WAF (web application firewall)