How many groups and digits are in an IPv6 address?

How many groups and digits are in an IPv6 address?

• A. Eight groups of four hexadecimal digits
• B. Sixteen groups of four decimal digits
• C. Eight groups of two hexadecimal digits
• D. Four groups of eight hexadecimal digits

Answer: (A)

IPv6 uses 128-bit addresses written as eight groups of four hexadecimal digits, with colons separating the groups. Each group represents 16 bits, so eight groups × 16 bits equals 128 bits in total. The digits are hexadecimal, meaning each position can be 0–9 or a–f. Some people see the shorthand :: to compress consecutive zero groups, but the full expanded form has eight groups of four hex digits. That’s why the description eight groups of four hexadecimal digits is the correct way to describe an IPv6 address.

IPv6 uses 128-bit addresses written as eight groups of four hexadecimal digits, with colons separating the groups. Each group represents 16 bits, so eight groups × 16 bits equals 128 bits in total. The digits are hexadecimal, meaning each position can be 0–9 or a–f. Some people see the shorthand :: to compress consecutive zero groups, but the full expanded form has eight groups of four hex digits. That’s why the description eight groups of four hexadecimal digits is the correct way to describe an IPv6 address.