Which of the following is a valid IPv6 address?

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Multiple Choice

Which of the following is a valid IPv6 address?

Explanation:
IPv6 addresses are written as eight blocks of four hexadecimal digits, each block representing 16 bits, and these blocks are separated by colons. The example shown has exactly eight groups: 2001, 0db8, 85a3, 03eF, 7cb3, 8a2e, 0370, 7334, all using hexadecimal digits 0-9 and a-f (case-insensitive). That matches the standard format perfectly. The other options don’t fit the IPv6 format. One uses dots and decimal octets, which belongs to IPv4; another has a value of 256 in an octet, which is outside the 0–255 range for IPv4; and the last uses a group with five hexadecimal digits and not eight groups, which isn’t allowed in IPv6 unless you use a compression shorthand that isn’t present here.

IPv6 addresses are written as eight blocks of four hexadecimal digits, each block representing 16 bits, and these blocks are separated by colons. The example shown has exactly eight groups: 2001, 0db8, 85a3, 03eF, 7cb3, 8a2e, 0370, 7334, all using hexadecimal digits 0-9 and a-f (case-insensitive). That matches the standard format perfectly.

The other options don’t fit the IPv6 format. One uses dots and decimal octets, which belongs to IPv4; another has a value of 256 in an octet, which is outside the 0–255 range for IPv4; and the last uses a group with five hexadecimal digits and not eight groups, which isn’t allowed in IPv6 unless you use a compression shorthand that isn’t present here.

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