Defining a Subnet
An IP subnet is a subset of a classful network, created by choice of some network engineer. However, that engineer cannot pick just any arbitrary subset of addresses; instead, the engineer must follow certain rules, such as the following:
The subnet contains a set of consecutive numbers.
The subnet holds 2H numbers, where H is the number of host bits defined by the subnet mask.
Two special numbers in the range cannot be used ...
Get CCENT/CCNA ICND1 100-101 Official Cert Guide now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
