Computer Networking · Beginner level

Beginner level · Module 4 of 5 · 11 guided hours

Network Security Basics

Protect small networks with secure credentials, updates and careful sharing.

Learning objectives

  • Remove default credentials and weak settings
  • Keep network devices updated and access-controlled
  • Share files and printers safely

Topics

  • default credentials
  • firmware updates
  • remote management
  • MAC filtering myths
  • file and printer sharing
  • network inventory

Lessons

  1. Lesson 1 Default Credentials and Weak Settings

    Close the easiest ways into a network.

    default passwordsremote managementUPnPunused services

  2. Lesson 2 Firmware and Access Control

    Keep network devices updated and limit who can manage them.

    firmwareupdate processadmin accessend-of-life devices

  3. Lesson 3 Safe File and Printer Sharing

    Share resources on the network without exposing them.

    shared folderspermissionsprinter sharinginventory

Practical activity

Audit a lab network for default passwords, outdated firmware, unnecessary services and open shares, and fix the findings.

Expected outcomes

  • A hardened small network
  • A device inventory

Assessment

Audit checklist and fixes reviewed.

Free taster lesson Network Security Basics: Strong Wi-Fi Settings Read a free self-study lesson on this topic in the Free Course Library.

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.