Network Guru

In every network-whether it is a home setup or a large enterprise backbone-specific hardware devices work together to move data efficiently and securely. Understanding what these devices do, and where they operate in the OSI model , helps engineers design, troubleshoot, and secure networks with confidence. Below is a clear, real-world guide to the most common network devices you will encounter and how each one fits into the bigger picture. 1. Hub & Repeater - Extending the Physical Signal (OSI Layer 1) These are the simplest devices in the networking world. Repeaters regenerate weak signals to extend distance. Hubs broadcast incoming signals to every connected port without intelligence. Where they operate:   ✔ OSI Layer 1 - Physical Layer Where used: Legacy networks or extremely small environments. Modern networks rarely use hubs due to inefficiency and collision issues. 2. Switch - The Heart of Every LAN (OSI Layer 2) A switch is the fundamental building block of ...