Introduction to Networking

Start with the frameworks that govern all networking. Understand each layer of the OSI model, how TCP/IP maps to it, and why this knowledge is the bedrock of every networking conversation.

Master IPv4 addressing, CIDR notation, and subnetting by hand and with tools. Design efficient address schemes — one of the most tested skills in all networking certifications.

Configure Layer 2 switching, understand MAC address tables, and set up VLANs to segment network traffic. Hands-on lab work with real switch configuration syntax.

Understand how routers forward packets, configure static routes, and explore dynamic routing protocols. Learn how traffic finds its way across complex multi-hop networks.

The three services that make networks usable. Configure DNS resolution, set up DHCP scopes, and understand NAT — how private addresses reach the public internet.

Use ping, traceroute, nslookup, netstat, and Wireshark to troubleshoot connectivity issues. Learn to read packet captures and identify problems at any network layer.

Configure Wi-Fi networks, understand 802.11 standards, security protocols (WPA2/WPA3), and common wireless issues. Covers both SOHO and enterprise wireless concepts.

Explore how networks connect over long distances — MPLS, SD-WAN, leased lines, and VPNs. Understand tunnelling, encryption basics, and how remote access is secured in real organisations.