Which statement about IPv4 addresses is true?

Which statement about IPv4 addresses is true?

• A. They are written in dotted decimal form
• B. They are written in hexadecimal form
• C. They are written in binary form
• D. They are written in domain-name form in the address

Answer: (A)

IPv4 addresses are 32-bit numbers that are typically written in dotted decimal notation: four octets, each ranging from 0 to 255, separated by periods. This formatting makes addresses easy to read and write, as in 192.168.0.1. Under the hood the address is a binary value, but for everyday use we display it as four decimal numbers. Other representations exist in low-level contexts (binary or hexadecimal), and a domain-name form (like a hostname) is used instead of a numeric address when users refer to devices, with DNS mapping the name to the numeric address. So the dotted decimal form is the standard, true way IPv4 addresses are written.

IPv4 addresses are 32-bit numbers that are typically written in dotted decimal notation: four octets, each ranging from 0 to 255, separated by periods. This formatting makes addresses easy to read and write, as in 192.168.0.1. Under the hood the address is a binary value, but for everyday use we display it as four decimal numbers. Other representations exist in low-level contexts (binary or hexadecimal), and a domain-name form (like a hostname) is used instead of a numeric address when users refer to devices, with DNS mapping the name to the numeric address. So the dotted decimal form is the standard, true way IPv4 addresses are written.