Networking Fundamentals

How devices find each other, and how to trace the fault when they stop.

What the course covers

8 modules, 32 topics. Open any one to see what sits inside it.

1. 1.1 Devices, links, and why they need rules
2. 1.2 LAN, WAN and everything between
3. 1.3 Clients, servers and peers
4. 1.4 The layered model in plain language
1. 2.1 Hardware addresses and the local link
2. 2.2 IP addresses and subnets
3. 2.3 Public, private and address translation
4. 2.4 How a device is given an address
1. 3.1 What happens when you type an address
2. 3.2 Default gateways
3. 3.3 Routing in simple terms
4. 3.4 Tracing the path a packet takes
1. 4.1 Cables, connectors and standards
2. 4.2 Switches and ports
3. 4.3 Wireless channels, bands and interference
4. 4.4 Power over Ethernet and site wiring
1. 5.1 Connection-based and connectionless traffic
2. 5.2 Ports, and what is listening on them
3. 5.3 Web traffic and certificates
4. 5.4 Mail, file and print protocols
1. 6.1 Firewalls and what they actually block
2. 6.2 Remote access and tunnels
3. 6.3 Wireless security settings
4. 6.4 Segmentation and guest networks
1. 7.1 A method for network troubleshooting
2. 7.2 The command line tools that answer the question
3. 7.3 Reading a router or switch status page
4. 7.4 Speed, latency and packet loss
1. 8.1 Documenting what you have
2. 8.2 Naming and addressing plans
3. 8.3 Monitoring and alerts
4. 8.4 Planning for growth and for failure

By the end of this course you will be able to explain and apply:

Two hours, not two months Eight short modules. Finish in a day, or do one module a night for a week.

Job-ready from the first module Everything here is a task you will actually be asked to do at work, not theory you will never use.

Built for a phone Watch on the bus, pause mid-module, pick up where you stopped. No download, no lab.

A certificate that can be checked Every certificate carries an ID your college or an employer can verify on our site.

Pre-degree / Foundation students in India
Studying: BCA, B.Sc. Computer Science, B.Sc. IT, B.Tech CSE/IT, B.Sc. Data Science
Recent graduates strengthening a CV
Anyone working in this field without a formal qualification

About two hours in total — eight modules of roughly fifteen minutes. You can do it in one sitting or spread it across a week. Your place is saved either way.
No. There is no prerequisite course and no software to install. A phone, tablet or computer with an internet connection is enough.
Yes. This course is placed at Pre-degree / Foundation for India, and the content is written for that level. If you are at a different stage, change your level at the top of the page and the courses will change with it.
A certificate for the course, carrying an ID that your college or an employer can check on our verification page. You keep access to the material afterwards.
Yes — ₹450 for this course on its own, or ₹1,450 for all five in this set, which works out cheaper if you want more than one.
There is a short quiz at the end of each module so you can check what stuck. It is not timed and you can retake it.
Change your country using the picker at the top. Level names, degree names and prices all switch to that country, and the courses adjust to its education system.

Wording shown for India. Pick a different country at the top and the terms, currency and programme names change with it.