Networking Fundamentals
Core principles of modern networking. IP addressing, DNS, routing, protocols, ports, and how data flows across networks.
9 articles in this chapter
Start Here: Your Guide to GoSetup
Welcome to GoSetup. This guide explains how to use this site and why understanding basic networking matters for everyone.
Network Devices: Modem, Router, and Switch
Understanding the core network devices — modem, router, and switch — and how they work together to build a stable infrastructure.
Network Types: LAN & WAN
Understanding the two fundamental network types: LAN for internal communication and WAN for global connectivity. The foundation of residential networking.
How a Device Joins the Network
Understanding the step-by-step process of how devices connect to a network — from MAC addresses to DHCP, IP addressing, and gateway configuration.
How a Connection Is Established
Understanding the connection process: DNS resolution, TCP vs UDP, ports, sockets, and the three-way handshake explained step by step.
How Data Travels Across the Internet
Understanding the journey of data packets: private vs public IPs, NAT translation, routing across the Internet, and the role of IPv6.
TCP and UDP — How Data Is Delivered in a Network
Understanding the two transport protocols: TCP for reliable delivery with acknowledgments, and UDP for fast, low-latency transmission.
Troubleshooting: How to Check Internet Speed and Connection Quality
A practical diagnostic guide: from speed tests to PowerShell commands. Learn to identify whether issues are in your local network, DNS, or with your ISP.
Network Fundamentals Glossary
A reference guide defining core networking terms: IP, DHCP, DNS, TCP, UDP, LAN, WAN, and other essential concepts for home network understanding.