You think you have to be Superbrain to understand it?
You are wrong!Here the step-by-step course.
After reading and some self-training, you should be able to fix Subnetting-Questions in CCNA Exam
without any problems in a snatch.
What is a Subnetmask?
With Subnetmasks, we can divide an IP-Address in network-part and in host-part.
A given IP-Network can be divided in smaller parts. Each of this smaller parts is called a "Subnet".
Read more: The Best Steps (Step by Step Course) Learning SUBNETTING
