Before moving on, a short review of typical IP subnetting terms and typical applications should help clarify the terms used in this book and will act as a refresher for those already versed in IP addressing.
A /24 designator placed after a network IP address in diagrams or device configurations is a Classless Inter-Domain Routing (CIDR) designator that indicates the following:
The first 24 out of the 32 bits in the 4-byte IP address represents the network portion of any IP address on this network. This network is designated as
10.1.1.0(the next/24network would be10.1.2.0, then10.1.3.0, and so on).The last 8 bits of the 32-bit address can be used to give workstations, hosts, and other devices an IP address, with the following exceptions:
The first host address on this network is reserved as a network designator to build routing tables:
10.1.1.0(typically called the loopback address)The last host address on this network is reserved as an IP broadcast address:
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