Network Devices - Hosts, IP Addresses, Networks - Networking Fundamentals - Lesson 1a

Introduction to Networking | Network Fundamentals Part 1 (Revised)

Intro to Computer Networks - Crash Course

What Is Network Security? | Introduction To Network Security | Network Security Tutorial|Simplilearn

Network Security Tutorial | Introduction to Network Security | Network Security Tools | Edureka

Network security explained: Benefits, threats, and best practices