IPv6 Addresses

128 bit (16 bytes) integer
consists of 8 16-bit fields, separated ":"s
                2001:0db8:0019:2000:0000:0000:fe71:81fc
Abbreviations
beginning 0's in each field can be omitted
                2001:db8:19:2000:0:0:fe71:81fc
successive fields consisting of 0's can be shrinked to "::"
                3ffe:0501:19:2000::fe71:81fc
Extreme examples
                :: (c.f. 0.0.0.0)
                ::1 (c.f. 127.0.0.1)
IPv6 Prefix: "Address/Prefix length"
e.g.: 2001:200::/32