Скачать или смотреть Subnetting - An Overview

A short supplemental lecture on Subnetting. Feel free to leave a comments below.

Here are a few things to note that I forgot to mention in my video:

1) CIDR notation: I forgot to mention that the number used in CIDR notation is the number of NETWORK bits in the subnet mask (that is, the number of 1's in the binary of the subnet mask). For example, in a Class-C Classful subnet (255.255.255.0), the CIDR notation is /24. This is because there are 24 network bits in the subnet mask (11111111.11111111.11111111.00000000). A Class-A Classful subnet (255.0.0.0), the CIDR notation is /8 because there are 8 network bits (11111111.00000000.00000000.00000000).