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      • Part4: LAN vs WAN vs Internet (Explained Simply)
      • Part 5: What Is a Firewall? (Explained Simply)
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bill

Bill is an experienced IT and network professional with a passion for building reliable, secure, and scalable infrastructure for businesses and home labs alike. As the founder and voice behind **Relay Rack 1**, Bill focuses on practical, real-world networking solutions—bridging the gap between enterprise-grade technology and approachable, hands-on guidance.With years of experience supporting and designing networks across multiple industries, Bill specializes in routing and switching, network security, virtualization, and systems administration. His background includes extensive work with technologies such as Cisco, pfSense, Proxmox, VLAN segmentation, VPNs, firewalls, and Linux-based servers, along with modern cloud and automation tools.At Relay Rack 1, Bill shares in-depth tutorials, troubleshooting guides, and best practices aimed at: - Network engineers and sysadmins - Small businesses and MSPs - IT professionals building labs or production environments - Technology enthusiasts who want to learn *how things really work*What sets Bill apart is his focus on **clarity and usability**. Rather than abstract theory, his content emphasizes step-by-step instructions, diagrams, and real configurations that readers can immediately apply. Whether it’s optimizing a Proxmox cluster, hardening a firewall, configuring terminal workflows, or designing resilient networks, his goal is always the same: **make complex systems understandable and dependable**.When he’s not working on networks or writing for Relay Rack 1, Bill enjoys experimenting with new infrastructure tools, refining automation workflows, and continuously learning in the ever-evolving world of IT.**Relay Rack 1** exists to document that journey—and to help others build smarter, stronger networks along the way.

What Is a Firewall?

December 29, 2025 by bill
Relay Rack 1 branded diagram showing how a firewall protects a network by controlling traffic between the internet and internal systems

Learn what a firewall is, how firewalls work, and why they are essential for protecting home and business networks from cyber threats.

Categories Firewalls, 🛡️ Network Security & Reliability Tags firewall, ids, ips, NGFW Leave a comment

What Are Modems, Routers, and Switches?

December 29, 2025 by bill
Simple network diagram showing how a modem connects to a router and switch in a home or small business network

Learn what modems, routers, and switches are, how they work, and the key differences between them in modern networking environments.

Categories 🏗️ Infrastructure & Systems Content, 🧠 Network Engineering Expertise Tags firewall, modem, router, switch Leave a comment

Beginner SSH Key Setup Guide

January 1, 2026December 29, 2025 by bill
Beginner SSH key setup on a MacBook Pro showing terminal commands for secure remote access using SSH

Learn how to securely set up SSH keys on a MacBook Pro, store passphrases in macOS Keychain, and use SSH efficiently with iTerm2 and SecureCRT using easy, copy-and-paste commands.

Categories Cryptography, SSH Keys, 🛡️ Network Security & Reliability Tags key-gen, ssh Leave a comment
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📂 Archives

  • January 2026
  • December 2025


🏷️ Categories

  • A Beginner’s Guide Series
  • Artificial Intelligence
  • Cryptography
  • Firewalls
  • Network Engineering Basics
  • Part 1: What Is a Network?
  • Part 10: Entry-Level Network Engineering Tools
  • Part 2: Modems, Routers, and Switches Explained
  • Part 3: IP Addresses and Subnets (Made Simple)
  • Part 4: LAN vs WAN vs Internet (Explained Simply)
  • Part 5: What Is a Firewall? (Explained Simply)
  • Part 6: What is DNS and Why It Matters
  • Part 7: What Is DHCP? (And Why Networks Depend on It)
  • Part 8: Wired vs Wireless Networking (Explained Simply)
  • Part 9: Basic Network Security Concepts (Explained Simply)
  • ssh
  • SSH Keys
  • Terminal Emulators
  • Tools
  • 🏗️ Infrastructure & Systems Content
  • 📚 Learning & Career Development
  • 📰 Industry Insights & Practical Commentary
  • 🛠️ Tools, Templates & Automation
  • 🛡️ Network Security & Reliability
  • 🧠 Network Engineering Expertise


📰 Recent Posts

  • Entry-Level Network Engineering Tools
  • Basic Network Security Concepts (Explained Simply)
  • Wired vs Wireless Networking (Explained Simply)
  • What Is DHCP? (And Why Networks Depend on It)
  • What Is DNS and Why It Matters
  • What Is a Firewall? (Explained Simply)
  • LAN vs WAN vs Internet (Explained Simply)
  • IP Addresses and Subnets (Made Simple)
  • Modems Routers and Switches Explained
  • What Is a Network?
  • Network Engineering Basics
  • Public and Private Keys Explained
  • What Is a Firewall?
  • What Are Modems, Routers, and Switches?
  • Beginner SSH Key Setup Guide
  • What Is SSH and How to Use It Securely
  • How AI Is Changing Network Engineering
  • Advanced iTerm2 Configuration
  • Beginner’s Guide to iTerm2
  • iTerm2 Explained
  • Terminal Emulators Explained


👥💬 Recent Comments

  1. Eric on Modems Routers and Switches Explained

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