Beginner level · Module 4: Network Security Basics · Lesson 2 of 3
Firmware and Access Control
Keep network devices updated and limit who can manage them.
In this lesson you will
- Update firmware safely
- Restrict management access
Key concepts
firmwareupdate processadmin accessend-of-life devices
The lesson
Firmware is the software inside network devices. Updates fix security flaws; check for them regularly or enable automatic updates.
Update carefully: back up the configuration, do not power off during the update and test afterwards.
Limit who knows admin passwords, manage devices only from inside the network and replace devices that no longer receive updates.
Step by step
- Check firmware versions.
- Back up configurations.
- Apply an update in the lab.
- Record who has admin access.
Practice activity
Update the lab router firmware and document admin access.
Expected result: Updated firmware and an access list.
Check your understanding
-
Why back up before a firmware update?
Show answer
To restore settings if something goes wrong.
-
What should happen to devices without updates?
Show answer
They should be replaced.
Taught live by an instructor — online or in person. Free course lessons are for self-study and do not lead to a certificate — see registration options.