✅ OSPF Network Types – Complete Technical Notes 🔧 What Are OSPF Network Types? OSPF (Open Shortest Path First) network types define how routers communicate over different media. They control: ...

Troubleshooting Steps for a Network Engineer Step 1. Identify the Problem Goal: Gather all necessary information to understand the issue clearly. Actions: Talk to the user and collect details:...

Port Security – Layer 2 Security 1. Introduction to Port Security Port Security is a Layer 2 security feature used on switches to control access to a switch port by restricting the number and typ...

🌐 Network Address Translation (NAT) – Complete Technical Notes 1. Introduction to NAT 1.1 What is NAT? NAT (Network Address Translation) modifies the source and/or destination IP address of p...

📘 Comprehensive Notes: Cisco Discovery Protocol (CDP) & Link Layer Discovery Protocol (LLDP) 1. 🔹 Introduction to Layer 2 Discovery Protocols In complex networks, maintaining accurate docu...

📘 Dynamic Trunking Protocol (DTP) & VLAN Trunking Protocol (VTP) Complete Technical Notes for Learners, Interview Prep, and Revision 🔹 Introduction: Auxiliary VLAN Protocols Dynamic Tr...

🔧 VLANs (Virtual LANs) - Complete Technical Notes 📌 Overview A Virtual LAN (VLAN) is a logical group of devices segmented at Layer 2 (Data Link Layer) of the OSI model. Unlike subnetting (Layer ...

🌐 Spanning Tree Protocol (STP) & Rapid Spanning Tree Protocol (RSTP) — Technical Notes 📌 Introduction: Why STP is Critical Ethernet LANs use redundant paths for fault tolerance. ...

📘 OSPF Cost – Complete Technical Guide for Interview & Learning Purpose: This guide is designed for learners, professionals, and interviewers who want a complete and technical understanding of...

🧠 EtherChannel – The Ultimate Technical Guide Learn. Revise. Interview. Repeat. 📌 A complete EtherChannel reference built for learners, job seekers, interviewers, and network professionals. 💡 Cov...