Cybersecurity · Network Security Basics
What is a Firewall?
Learn how traffic rules allow trusted communication and block unwanted connections.
2 min micro-lessonLesson focus
What is a Firewall?Explain the role and meaning of “a Firewall” and connect it to a familiar technology scenario.
Video resources will be added as each NEST lesson is published.Learning objective
What you will understand
Explain the role and meaning of “a Firewall” and connect it to a familiar technology scenario.
Key ideas
- Traffic filtering
- Rules
- Inbound and outbound traffic
Try it
Decide which sample connections a basic firewall should allow.
Quick recap
Learn how traffic rules allow trusted communication and block unwanted connections.