🛡️ Free practice test question from: Security+ (Security+)

An IPv4 address is a 32-bit number. This 32-bit number is divided into four groups of 8 bits each. Each 8-bit group is called an octet (because "oct" refers to eight).

Octet: A unit of 8 bits.

So, since an IPv4 address has four groups of 8 bits, it has four octets.

For example, the IPv4 address 192.168.1.1 is represented in binary as:

11000000.10101000.00000001.00000001

Each of the sections separated by dots represents one octet (8 bits).