Core Skills · Free course
Networking Fundementals
The fundamentals of business networking for IT staff and helpdesk technicians: how networks work, topologies, IP addressing, hardware and cabling, Wi-Fi, and network security.
- Modules
- 6
- Time
- 2 h 20 min
- Level
- Intermediate
- Cost
- Free
What you'll learn.
- How networks work, including the OSI model, TCP/IP and encapsulation
- Common topologies and architectures, and how the layer a fault occurs at determines who is affected
- How IP addressing, subnet masks, DHCP and DNS work, and the commands for diagnosing them
- What switches, routers, firewalls and cabling do, and how to rule out physical problems first
- How Wi-Fi standards, frequency bands and enterprise wireless work, and why connections slow down
- Network security fundamentals, from VLANs and encryption to recognising and escalating an incident
Who it's for.
IT staff and helpdesk technicians who support users and devices on a business network.
Course outline.
- Module 1: How Networks Work — Concepts, Components and Models
- Module 2: Network Topologies and Architectures
- Module 3: IP Addressing and Subnetting
- Module 4: Network Hardware and Cabling
- Module 5: Wireless Networking
- Module 6: Network Security Fundamentals
Learn. Quiz. Earn a badge.
Short modules, a quick quiz after each one, and a badge when you finish the track. Pick up where you left off.
Start track →Is this course free?
Yes. Public courses in the Dr Logic Academy are free. You just need an Academy account to save your progress.
How long does it take?
About 140 minutes, across 6 short modules. Go at your own pace and pick up where you left off.
How does it work?
Each module ends with a short quiz. Pass them all to complete the track.
Do I earn a badge?
Yes. You earn a badge when you complete the track, and it shows on your Academy profile.
How technical is it?
It's pitched at an intermediate level and stays practical, with a troubleshooting focus and the everyday commands helpdesk staff rely on, such as ipconfig, ping and nslookup.
Does it cover Wi-Fi security?
Yes. It covers WPA2 and WPA3, why older standards should not be used, guest network isolation, and enterprise authentication with 802.1X.
