Chapter 10: Layer 3 - Routing and Addressing Labs:

10.4.1 | In this lab, you will learn different classes of IP addresses and how TCP/IP networks operate.
10.6.6 | In this lab, you will learn the basics of IP subnet masks and their use with TCP/IP networks.
10.7.5 | This lab focuses on a Class B network with three subnets. It will help you develop a better understanding of IP subnet mask.
10.7.7 | This lab focuses on a Class C network with three subnets and using a Custom Subnet Mask. It will help you develop a better understanding of IP subnet masks.