đ Inter-VLAN Routing Configuration (Layer 3 Switch + Router-on-a-Stick) đĽ Introduction (Real Problem You Might Face) You created VLANs perfectly⌠but: â HR cannot access Sales server â IT team cannot manage other VLANs â Ping fails between departments đ Devices in different VLANs cannot communicate. đ Everything looks correctâbut communication is blocked. For example: … Read more
đ VLAN vs Subnet â Whatâs the Difference? (With Real Network Example) đ Introduction (Real Problem You Face Daily) You created VLANs⌠but devices still canât communicate. You configured IP addresses⌠but network is still broken. đ Sound familiar? Thatâs because many admins mix up VLAN vs Subnet. VLAN controls network separation Subnet controls IP … Read more
đ§ VLAN Configuration in Cisco Switch (Step-by-Step + Real Example + Troubleshooting) đ Introduction (Real Problem Scenario) In many real-world networks, you may face issues like: All users accessing each otherâs systems Slow network due to broadcast traffic No proper separation between departments đ These problems usually occur when VLAN is not configured correctly. Managing … Read more
đ Types of VLAN Explained (Data, Voice, Management,Assignment Methods – Static & Dynamic,Concepts – Default and Native VLAN) đ¨ Introduction: Why VLAN Types Confuse Everyone Many beginners understand VLAN basics but often get confused when they hear or search terms like ” types of VLAN ” or search terms like : Default VLAN Data VLAN … Read more
đHow VLAN Works ? (Packet Flow + Visualization + Tagged vs Untagged frames Explained Visually) đIntroduction (â ď¸ 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
đ What is VLAN? Complete Guide with Examples, Commands & Use Cases đ 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. đ What happens when … Read more
đLink Layer Discovery Protocol ( LLDP ) Explained with Commands & Practical Examples đ§ 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. đ In simple terms: LLDP helps devices automatically identify … Read more
đCisco 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 â especially when documentation is missing or outdated. This is where Cisco Discovery Protocol (CDP) becomes extremely useful. As someone working in networking, Iâve personally used CDP … Read more
đ§ 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
đ 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