What is a Subnet Mask

Silicon Dojo - https://www.meetup.com/silicon-dojo-free-technology-education/ 00:00 Introduction 01:46 What is an IP Address and Network 12:00 What is a Subnet Mask 14:07 Octets and Numbering 20:57 How to Subnet with Octets 27:03 Number of Hosts in a Subnet 29:55 Subnet Classes 40:36 Private Addresses 51:29 Final Thoughts