Learn network types, devices, IP addressing, common protocols, Wi-Fi, basic troubleshooting and essential network security.
minutes · Self-paced
Explore networking without prior IT experience. Learn what a network is, how local and wide-area networks differ, and what routers, switches and access points do. Understand IP addresses, DNS and common network protocols at an introductory level. Practise reading connection information, identifying Wi-Fi issues and applying security habits to home and small-office networks.
Basic computer literacy is helpful. No network equipment or configuration experience is required.
In this module: A network connects devices so they can exchange data and share services such as printers, files and internet access. A LAN covers a limited area, while a WAN connects networks across larger distances.
minIn this module: A switch connects wired devices within a local network. A router moves traffic between networks, and a wireless access point provides Wi-Fi. Some home devices combine several roles.
minIn this module: An IP address identifies a network interface. A subnet mask or prefix helps determine which addresses are local, and a default gateway routes traffic to other networks. Do not change managed settings without permission.
minIn this module: DNS translates domain names into addresses used for communication. DHCP can assign network settings automatically. Web, email and file services use different protocols; learn each service's purpose before troubleshooting.
minIn this module: Wi-Fi uses radio signals, so range, walls and interference can affect performance. Use a strong unique network password and modern security settings supported by the equipment.
minIn this module: Network settings show connection status, addresses and signal strength. Basic tools can test reachability or name resolution, but one failed response does not always prove the network is down.
minIn this module: Check the device, Wi-Fi or cable, local router, DNS and external service in a consistent order. Ask whether other devices are affected and whether the issue began after a change.
minIn this module: Change default administrative credentials, update equipment through trusted channels, use secure Wi-Fi settings and disable features that are not needed. Separate guest access from private devices where possible.
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