How many unique addresses are supported by IP version 6?

How many unique addresses are supported by IP version 6?

• A. 2 to the 32nd power
• B. 2 to the 64th power
• C. 2 to the 128th power
• D. 2 to the 256th power

Answer: (C)

IP version 6 (IPv6) is designed to address the limitations of its predecessor, IPv4, specifically in terms of the number of unique addresses it can provide. IPv6 utilizes a 128-bit address space, which significantly increases the number of available unique addresses. The total number of unique addresses that can be represented in an IPv6 system is calculated as 2 raised to the power of 128. This results in a vast number of addresses—approximately 340 undecillion unique addresses (that’s 340 followed by 36 zeros), allowing for an incredibly large number of devices to be connected to the internet without the need for address sharing that was common in IPv4. Thus, the correct answer reflects the vast capability of IPv6 to support a much larger number of devices compared to outdated systems, positioning it as the preferred protocol as the internet continues to grow.

IP version 6 (IPv6) is designed to address the limitations of its predecessor, IPv4, specifically in terms of the number of unique addresses it can provide. IPv6 utilizes a 128-bit address space, which significantly increases the number of available unique addresses.

The total number of unique addresses that can be represented in an IPv6 system is calculated as 2 raised to the power of 128. This results in a vast number of addresses—approximately 340 undecillion unique addresses (that’s 340 followed by 36 zeros), allowing for an incredibly large number of devices to be connected to the internet without the need for address sharing that was common in IPv4.

Thus, the correct answer reflects the vast capability of IPv6 to support a much larger number of devices compared to outdated systems, positioning it as the preferred protocol as the internet continues to grow.