Cybersecurity · Intermediate level

Intermediate level · Module 1: Network Security Fundamentals · Lesson 3 of 3

Guest Networks and Segmentation

Separate networks so a problem in one does not spread to all.

In this lesson you will

  • Explain network segmentation
  • Set up a guest network

Key concepts

segmentationguest networkIoT devicesclient isolation

The lesson

Segmentation divides a network so devices can reach only what they need. Visitors' phones should not be able to reach the finance computer.

A guest network with client isolation gives visitors internet access only. Cameras and smart devices can go on their own network too.

Larger offices use VLANs for segmentation; small offices can start with the router's guest network feature.

Step by step

  1. List device groups in the office.
  2. Decide which groups need to talk to each other.
  3. Create a guest network with isolation.
  4. Test that guests cannot reach office devices.

Practice activity

Design and test segmentation for the lab office network.

Expected result: Separate staff and guest networks verified by testing.

Check your understanding

  1. What is network segmentation?

    Show answer

    Dividing a network so devices reach only what they need.

  2. What should a guest network provide?

    Show answer

    Internet access only, with no access to office devices.

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