Networking Security Fundamentals: Firewalls, VPNs, and Network Segmentation

<p>A story-driven introduction to networking security fundamentals: how TCP/IP concepts shape firewall rules, how stateful firewalls and least-access design lock down a small company network, how site-to-site and remote-access VPNs connect offices and people securely, and how VLANs, subnetting, and a DMZ contain the blast radius after a real breach.</p>

Tools: network security, firewalls, vpn, network segmentation