Rules About Which Hosts Are in Which Subnet
Every device that connects to an IP internetwork needs to have an IP address. These devices include computers used by end users, servers, mobile phones, laptops, IP phones, tablets, and networking devices like routers, switches, and firewalls (in short, any device that uses IP to send and receive packets needs an IP address).
Note
When discussing IP addressing, the term network has specific meaning: a Class A, B, or C IP network. To avoid confusion with that use of the term network, this book uses the terms internetwork and enterprise network when referring to a collection of hosts, routers, switches, and so on.
The IP addresses must be assigned according to some basic rules, and for good reasons. ...
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