Core Networking Concepts
These are the building blocks of TCP/IP networking. Click on any card to learn more about its role and importance in connecting Linux systems to a network.
IP Address
A unique numerical label assigned to each device on a network, used for identification and location addressing.
Subnet Mask
A number that defines a range of IP addresses available within a network. It distinguishes the network address from the host address.
Default Gateway
The router or device that serves as an access point to other networks, including the internet. It’s where traffic is sent when the destination is outside the local network.
DNS Server
The “phonebook of the internet.” It translates human-friendly domain names (e.g., google.com) into machine-readable IP addresses.
Network Interface
The hardware component (e.g., Ethernet card, Wi-Fi adapter) that connects a computer to a network. In Linux, they have names like `eth0` or `wlan0`.
TCP/IP
The foundational protocol suite of the internet. It defines how data is broken into packets, addressed, transmitted, routed, and received.
Configuration Lab
Practice makes perfect. This lab lets you see how to apply persistent network settings on different Linux systems. Select a distribution and configuration type to view the correct files and commands.
Command Reference
Your quick-access cheat sheet for essential Linux networking commands. All details are visible for quick reference.
Troubleshooting Wizard
Facing a network issue? This step-by-step wizard will guide you through a logical diagnostic process to identify the root cause of common connectivity problems.