How many Octets do IPv4 IP addresses have?

IPv4 IP addresses consist of four octets, which are each 8 bits in length. This means that an IPv4 address is made up of 32 bits total, with each of the four octets separated by periods. For example, the address 192.168.1.1 comprises four octets: 192, 168, 1, and 1. This structure allows for a significant number of unique addresses, making it suitable for identifying devices in networks.

The other choices do not represent the correct structure of IPv4 addresses: two octets would not provide enough unique combinations for most networking needs, while three or five would not align with the defined standard for IPv4 addressing. Thus, the correct understanding of IPv4 addressing confirms that it is indeed composed of four octets.