World of Computer Networking Your CCNA start - What is Subnetting?

The video tutorial begins with a recap of previous lectures, focusing on network classes A, B, and C, and their default masks. It highlights the scarcity of public IP addresses and introduces subnetting as a solution to optimize IP usage. Subnetting allows the creation of multiple sub-networks from a single network by borrowing bits from the host part of an IP address. This process helps in efficient IP address management and network optimization. The tutorial concludes with a brief mention of upcoming topics.

What are the default masks for Class A, B, and C networks?

How can subnetting optimize the usage of public IP addresses?