Module 2: Core Networking Concepts

What You’ll Learn 

This is an introduction to networking including frames, MAC address, IPv4, ARP, IPv6 and wireless LANS.


In the Core Networking Concepts module we cover frames, MAC addresses and broadcast domains. Then we will move into IPv4/IPv6, ARP, routing and wireless LANs.
  • Welcome (8 sec)
    • Welcome to the Core Networking Concepts module where you will learn about hubs, switches and broadcast domains, routers and IP and even wireless networks!
Introduction to Networking - 54 minutes
  • What is a Network? (16 min)
    • Let’s get introduced to the world of Networks!
  • Networking Overview (19 min)
    • In this lesson we will discuss general networking, devices, graphical icons and terms.
  • Network Types ( 19 min)
    • We’ll break down the different types of networks: LAN, WAN, CAN, MAN, WLAN, WWAN, SAN and PAN!
Frames and MAC - 30 minutes
  • Bits, Bytes, and Ethernet Frames (17 min)
    • Let’s get started by learning exactly what bits and Bytes are and how Ethernet Frames enable network communication!
  • MAC Addresses & Frames (13 min)
    • Now that you have an idea about Ethernet Frames let’s dissect a MAC address.
Intro to Internet Protocol - 29 minutes
  • IP and a Brief History (15 min)
    • Let’s find out how it all started with Internet Protcol.
  • The IP Address (14 min)
    • The IP address – let’s break it down!
Address Resolution Protocol - 17 minutes
  • ARP – ARP, Gratuitous ARP and RARP (12 min)
    • Let’s dissect this protocol we can’t get by without – Address Resolution Protocol.
  • ARP – Diagram of an ARP Request (5 min)
    • Here, we will see exactly how ARP requests and ARP replies are used to build the ARP cache.
IP Version 6 - 32 minutes
  • IPv6 (32 min)
    • IPv6 is coming! Oh wait, it’s already here 🙂
Wireless LANs - 14 minutes
  • Wireless LANs 802.11 (14 min)
    • Let’s make sure we have down the basics of 802.11 Wireless Local Area Networks.


Guidance and Motivation


The program is created by engineering veterans who worked at Cisco, Arista Networks, top VARs, and in the U.S. Air Force. The founders have trained over 1000+ engineers for the military and built this curriculum from the ground up in order to make you job and mission-ready!

Over 40+ years of combined industry experience have been poured out into our Cyber Security Specialist program to take anyone from Zero to Engineer in 14 to 24 weeks.

Terry Kim

Founder and CEO of NexGenT – I’ve worked in the IT industry for 15+ years before starting this company and have been fortunate enough to work for some amazing companies such as Cisco Systems, Arista Networks, and Dimension Data as a Network Architect/Systems Engineer. And my mission is to help you level up in Information Technology!

Jacob Hess

I’m a Network Engineer, Entrepreneur, and Air Force veteran who is passionate about computer networking, education, and high performance teams. I enjoy people, teaching, learning, business, and cutting edge technology.

Pat Gorman

Pat Gorman, is a lover of all things tech-related & learning something new every day is his motive. Pat is a huge sports guy and plays soccer and hockey weekly. He enjoys teaching and spreading cybersecurity and other IT knowledge to the world. He holds quite a few IT certifications under his belt