IPv4 uses 32bits. How many bits does IPv6 use?

IPv4 uses 32bits. How many bits does IPv6 use?

• 64
• 256
• 32
• 128 

 

EXPLANATION

The size of an IPv6 address is 128 bits, compared to 32 bits in IPv4. 

The address space therefore has 2¹²⁸ = 340,282,366,920,938,463,463,374,607,431,768,211,456 addresses (approximately 3.4×10³⁸). Some blocks of this space and some specific addresses are reserved for special uses.