🌐How VLAN Works in Networking? (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 … 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challenges is identifying what devices are connected in your network — especially when documentation is missing or outdated.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 : What is Cisco Express Forwarding (CEF)? CEF stands for Cisco Express Forwarding. It is a Cisco proprietary method used for forwarding packets in routers and Layer 3 switches. In traditional routing, whenever a packet arrives, the router performs a lookup process every time, which involves CPU processing. This makes the forwarding slower … 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, two of the most important devices are routers and switches. While they may look similar, they serve completely different purposes in a network. In this guide, we will clearly explain: What a router is What a switch is Key differences between them When to use each device 🌐 What is … Read more
🧠 Introduction In networking, devices communicate using IP addresses, but actual data transmission happens using MAC addresses. This creates an important question: 👉 How does a device find the MAC address of another device using its IP address? This is where ARP (Address Resolution Protocol) comes into the picture. In this article, we will understand: … 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
🔍 iPhone 16 Pro Max vs iPhone 15 Pro Max – What’s New & Should You Upgrade? Apple has officially unveiled the iPhone 16 Pro Max, and as expected, it brings upgrades over last year’s iPhone 15 Pro Max. But are the changes significant enough to warrant an upgrade, or should you stick with your … Read more