🌐How VLAN Works ? (Packet Flow + Visualization + Tagged vs Untagged frames Explained Visually) 📌Introduction (⚠️ Real-World Problem) Modern networks often become complex and inefficient as the number of connected devices increases. Few common problems are : Multiple departments sharing the same network Increased security risks due to unrestricted access between departments Excessive broadcast … Read more
🌐 What is VLAN? Complete Guide with Examples, Commands & Use Cases 🔍 Introduction (Real Problem) In modern computer networks, one of the biggest challenges is unnecessary traffic and poor performance caused by excessive broadcasting. Imagine you have a network with 200+ devices across departments like IT, HR, Sales, and Finance. 👉 What happens when … Read more
📝Link Layer Discovery Protocol ( LLDP ) Explained with Commands & Practical Examples 🧠 What is LLDP? Link Layer Discovery Protocol (LLDP) is a vendor-neutral Layer 2 protocol (IEEE 802.1AB) that allows network devices to advertise their identity and capabilities to directly connected neighbors. 👉 In simple terms: LLDP helps devices automatically identify … Read more
📝Cisco Discovery Protocol (CDP) Explained with Commands & Real Examples In real-world networking, one of the most common challenges is identifying what devices are connected in your network — especially when documentation is missing or outdated. This is where Cisco Discovery Protocol (CDP) becomes extremely useful. As someone working in networking, I’ve personally used CDP … Read more
🧠 Introduction: Switch Hardware, Types, and Initial Configuration (Complete Beginner Guide) Network switches are one of the most important devices in modern networking. They are used to connect multiple devices within a local network and ensure efficient communication. Switch is a plug and play device. We can assign IP address on a switch. In production … Read more
📌 Introduction In computer networking, understanding how a switch learns MAC addresses is a fundamental concept, especially for students preparing for CCNP exam. A network switch operates at Layer 2 (Data Link Layer) of the OSI model and makes forwarding decisions based on MAC (Media Access Control) addresses, and not IP addresses. In this guide, … Read more