How does IPv6 notation represent an address efficiently?

IPv6 notation efficiently represents an address by omitting leading zeroes and using a method called zero compression for sequences of zeroes. Each IPv6 address consists of eight groups of four hexadecimal digits, which can be cumbersome to write out in full. To make it more manageable, IPv6 allows for the removal of leading zeroes within each group. For example, the group 00AB can be written as AB.

Additionally, if there are contiguous sequences of zero groups in the address, the longest such sequence can be replaced with a double colon (::). This simplification significantly reduces the length of the address and makes it easier to read and work with. For example, the address 2001:0db8:0000:0000:0000:ff00:0042:8329 can be shortened to 2001:db8::ff00:42:8329, making it more user-friendly.

In contrast, the other options do not provide the same efficiency in notation. Dotted decimal format is used with IPv4 addresses, binary representation is not practical for human use, and color-coded entries are not a part of standard IP addressing schemes. Thus, the correct method by which IPv6 notation achieves efficiency is through omitting