Multiple choice Which of the following is incorrect about IPv6 address format? IPv6 address has 8 groups of 4 hexadecimal digits. The first 64 bits of IPv6 (128-bit) address are known interface ID. In IPv6 address, each group represents 16 bits (4 hexa digits * 4 bit). In IPv6 address format, hex digits are not case sensitive. So, 'DBCA' is same as 'dbca' or 'DBca'. In IPv6 address, colon (:) is used as a separator. Reveal answer Fill a bubble to check yourself B Correct answer Explanation The first 64 bits of IPv6 (128-bit) address are known as the prefix. The prefix includes the network and subnet address. The last 64 bits of IPv6 (128-bit) address is the interface ID. This is the unique address assigned to an interface.