Extending Your Network: Unlocking Internet Connectivity
As I wrapped up the final module of Networking Fundamentals, I explored key technologies that extend networks onto the Internet. From port forwarding to firewalls, VPNs, and LAN devices, this module provided hands-on insights into how networks function beyond local environments.
Port Forwarding: Enabling Internet Access
The journey began with port forwarding, a crucial mechanism that allows applications and services—such as web servers—to be accessible beyond their local networks. Without it, services remain isolated, limiting access to users within the same direct network.
Firewalls: Network Security Gatekeepers
Next, I delved into firewalls, essential security devices that regulate traffic entering and leaving a network. I learned about:
- Stateful Firewalls – Keep track of active connections and allow only related traffic.
- Stateless Firewalls – Enforce security rules without maintaining connection history.
A hands-on exercise allowed me to configure a firewall to block malicious packets from reaching a web server, reinforcing its real-world importance.
Virtual Private Networks (VPNs): Secure Connectivity
VPNs create encrypted tunnels between devices on different networks, ensuring secure communication over the Internet. This section covered various VPN technologies and their benefits, highlighting how organizations and individuals use VPNs for privacy and security.
LAN Devices: Routers, Switches & TCP Handshakes
Before concluding the module, I revisited local area network (LAN) devices like routers and switches, gaining a deeper understanding of their role in managing network traffic. A practical exercise involving TCP packet transmission helped me analyze the number of handshakes required for a successful connection.
Achievement Unlocked: Networking Nerd Badge!
With this module complete, I earned the Networking Nerd badge, marking the end of Networking Fundamentals. Up next? How the Web Works: DNS in Detail—I’m excited to dive into the world of domain name systems!
