Final answer:
In order to enhance readability, IPv6 uses colon-hexadecimal notation, allowing for omission of leading zeros and the use of a double colon to represent consecutive blocks of zeros.
Step-by-step explanation:
To make addresses more readable, IPv6 specifies colon-hexadecimal notation. IPv6 addresses are composed of eight groups of four hexadecimal digits, each group representing 16 bits (two octets). These groups are separated by colons. A typical IPv6 address looks like this: 2001:0db8:85a3:0000:0000:8a2e:0370:7334.
However, to improve readability and convenience in representation, IPv6 allows for the omission of leading zeros within each block, and one occurrence of consecutive blocks of zero value can be represented by a double colon (::). For instance, the previous example can be abbreviated to 2001:db8:85a3::8a2e:0370:7334.