|  | 10.4 | IP Address Classes
| 10.4.2 | IP addresses as decimal numbers
IP addresses identify a device on a network and the network to which it is attached. To make them easy to remember, IP addresses are usually written in dotted decimal notation (4 decimal numbers separated by dots; for example, 166.122.23.130 - keep in mind that a decimal number is a base 10 number, the type we use in everyday life).