142. AQA A Level SLR21 How firewalls work
About this video
AQA Specification Reference
A Level 4.9.3.2
In this video we take a look at how firewalls work, in doing so we focus on the following areas: Packet filtering, Proxy servers, Stateful inspection.
Key questions:
- How does a firewall work?
- What is a proxy server?
- What is stateful packet inspection?
00:00 How firewalls work
00:03 Intro
00:08 Firewalls
00:56 Proxy servers
01:28 Packet filtering
01:57 Stateful packet inspection
02:23 Key questions
02:35 Outro
Last updated: 30.10.25
