Which statement is true about IP addressing differences between IPv4 and IPv6?

Which statement is true about IP addressing differences between IPv4 and IPv6?

• A. IPv4 uses 32-bit addresses; IPv6 uses 128-bit addresses, vastly increasing the address space.
• B. IPv4 addresses are written in binary; IPv6 addresses are written in binary as well.
• C. IPv4 uses 64-bit addresses.
• D. IPv6 uses decimal addresses.

Answer: (A)

IP addressing differences that matter here are the address length and how those addresses are written. IPv4 uses 32-bit addresses, which gives about 4.3 billion unique addresses. IPv6 uses 128-bit addresses, vastly expanding the available address space. This is why the statement is true: IPv4 addresses are 32 bits, IPv6 addresses are 128 bits, creating a huge increase in how many devices can be uniquely addressed. In addition, the two protocols use different notations: IPv4 is written in dotted decimal (four decimal numbers separated by dots), while IPv6 is written in hexadecimal and separated by colons. The other options are incorrect because they describe the addresses in binary or decimal form or give the wrong bit length for IPv4.

IP addressing differences that matter here are the address length and how those addresses are written. IPv4 uses 32-bit addresses, which gives about 4.3 billion unique addresses. IPv6 uses 128-bit addresses, vastly expanding the available address space. This is why the statement is true: IPv4 addresses are 32 bits, IPv6 addresses are 128 bits, creating a huge increase in how many devices can be uniquely addressed. In addition, the two protocols use different notations: IPv4 is written in dotted decimal (four decimal numbers separated by dots), while IPv6 is written in hexadecimal and separated by colons. The other options are incorrect because they describe the addresses in binary or decimal form or give the wrong bit length for IPv4.