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IT Infrastructure · Topic hub

Networking

Networking explains how systems find and talk to each other: addressing, switching, routing, DNS and the protocols on top. This hub covers fundamentals, design, troubleshooting and CCNA preparation.

Start with lesson 1
121
articles
11
kinds of content
Oct 2026
newest article
Who it is for
Beginners in IT, system administrators and anyone preparing for CCNA.
Prerequisites
None.

Start here read in this order

  1. What Is Basic Networking? IP, Subnets, DNS and Ports
    Explainer
  2. What Is the OSI Model in Networking?
    Explainer
  3. What Is an IPv6 Address? Format, Types and Why India Leads
    Explainer
  4. Complete List of Computer Ports with Types, Uses and Examples (2027)
    Commands & reference
  5. Most Common TCP and UDP Ports and Their Services (With Security Notes)
    Explainer
  6. How to Find Which Process Is Using a Port on Linux, Windows and macOS
    Tutorial
  7. How to Fix DNS Problems: Slow Lookups, DNS Leaks and DoH
    Troubleshooting
  8. How to Diagnose Firewall and Port Blocking Issues: A Step-by-Step Guide (2027)
    Troubleshooting

Concepts explained 31

Showing the newest 8 of 31. The rest are in all articles.

Tutorials 6

Commands & reference 1

Labs & projects 2

Troubleshooting 5

Comparisons 6

Tools 2

Certification preparation 19

Showing the newest 8 of 19. The rest are in all articles.

Interview preparation 40

Showing the newest 8 of 40. The rest are in all articles.

Careers & course information 8

Related news 1

All Networking articles 121, newest first

Hub structure updated 13 Nov 2026. Each article shows its own publication and update dates.