Learning network security is a crucial step for anyone looking to enter or advance in the cybersecurity field. Redditors have shared a wealth of advice and resources to help you build a solid foundation in networking, which is essential for understanding and defending against cyber threats. Here's a succinct guide based on their recommendations:

Fundamental Concepts

Start with the basics to build a strong foundation in networking.

• OSI Model and TCP/IP: Understand how data travels across a network. "The 7 layers of the OSI Model (Application, Presentation, Session, Transport, Network, Data Link, Physical)... Learn what each layer means, what PDUs travel across each layer and what protocols are associated with those layers."

• Subnetting and IP Addressing: Master the art of dividing networks. "Then you can move into IP Addresses and using VLSM and FLSM to start learning IP addressing schemes, and subnetting."

• VLANs and Routing: Learn about virtual local area networks and how data is routed between them. "After that I'd recommend getting into VLANs are learning inter-VLAN routing via the router-on-a-stick configuration first."

Certifications and Courses

Many Redditors recommend specific certifications and courses as structured learning paths.

• CompTIA Network+: A great starting point for networking basics. "Comptia Network+ is a good start, you don't have the take the exam if you don't need to, just watch professor Messer's videos or get the Study Guide if you prefer reading like I do."

• Cisco CCNA: A more in-depth certification that covers a broad range of networking topics. "Jeremy's IT labs in youtube CCNA course with packet tracer labs"

• Professor Messer's Network+ Courses: Free and comprehensive. "Professor Messer's Network+ courses on YouTube."

• Google Cloud Cybersecurity Certificate: Offers practical labs in live cloud environments. "I enjoyed Google Cloud Cybersecurity Certificate."

Books and Online Resources

For those who prefer reading or additional online learning.

• TCP/IP Illustrated: A highly recommended book for deep dives into TCP/IP. "Also, there is a great book called TCP/IP Illustrated."

• Sybex CCNA Book: A comprehensive guide for the CCNA exam. "Get a Sybex book about CCNA. Go through it… start from there."

• Pluralsight: A learning platform with a variety of networking courses. "Pluralsight is a great learning tool"

Hands-On Practice

Practical experience is key to solidifying your understanding.

• Packet Tracer and GNS3: Simulation tools for practicing networking configurations. "Cisco Packet Tracer (beginner-friendly)... emulate networks using a product called GNS3."

• Homelabbing: Set up your own network using old hardware or virtual machines. "The key to networking is you have to do it. I'd look into something openWRT, find a cheap old router you can install it on, and then go from there."

• Build a Server: Use a Raspberry Pi or an old PC to build a server and practice networking concepts. "Get an old used PC or raspberry Pi and build a server."

Roadmaps and Learning Plans

For a structured approach to learning cybersecurity, including networking.

• Cyber Ninja Training Plan: A spreadsheet with a list of free training resources. "Antisyphon put together the 'Cyber Ninja Training Plan' spreadsheet with a list of free training in topics like A+, Network+, Security+, Programming, 'Hacking', and Advanced Networking."

• Hack The Box and TryHackMe: Platforms for hands-on cybersecurity practice, including networking challenges. ["You could try out Hack The Box to