How many bits are there in an IPv4 address?

Correct answer: 32. An IPv4 address has 32 bits, written as four numbers such as 192.168.1.1.

Background: Each of the four numbers is 8 bits.

• 24: 24 is not the size of an IPv4 address.
• 16: 16 is not the size of an IPv4 address.
• 64: 64 is not the size of an IPv4 address.

Did you know? IPv4 can give about 4.3 billion addresses.

Memory trick: IPv4 = 32 bits.