🌐 Masterclass Notes: OSPF Virtual Links (The ABR Tunnel) 📘 Overview OSPF (Open Shortest Path First) adheres to a strict hierarchical model: 🔗 All non-backbone areas must connect directly to ...

🚀 How to Upload an Image to EVE-NG (Ultimate Step-by-Step Guide) Whether you’re a network engineer, a student preparing for certifications, or an IT professional building labs, EVE-NG (Emulated Vi...

OSPF Stub Area Concepts – Comprehensive Technical Notes 1. Introduction In large-scale OSPF (Open Shortest Path First) networks, stub areas are used to optimize scalability and reduce unnecessary...

🌐 OSPF LSA Types – The Complete Guide (OSPFv2 & OSPFv3) For Interviewers Learners Network Engineers Troubleshooters 🔍 What are ...

✅ 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: ...

🔐 Access Control Lists (ACLs): Technical Guide Welcome to the definitive guide to Access Control Lists (ACLs) — optimized for learners, revision, and interview preparation. This guide covers Stand...

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...