Configure TCP/IP - MCSA Windows Server 2012 R2: Installation and Configuration Study Guide - page 424

fIgure 8.13 IPv4/IPv6 comparison

IPv4

ddd ddd ddd ddd

ddd = 8 Bits in Dotted Decimal Notation
32 Bits Total

IPv6

hhhh hhhh hhhh hhhh hhhh hhhh hhhh hhhh

hhhh = 16 Bits in Hexadecimal Notation
128 Bits Total

IPv6 Address Shortcuts
There are several shortcuts for writing an IPv6 address. These are described in the
following list:
■ :0: stands for :0000:.
■ You can omit preceding 0s in any 16-bit word. For example, :DB8: and :0DB8: are
equivalent.
■ :: is a variable standing for enough zeros to round out the address to 128 bits. :: can be
used only once in an address.
You can use these shortcuts to represent the example address 2001:0DB8:0000:0000:12
34:0000:A9FE:133E, as shown here:
■

Compress :0000: into :0::

2001:0DB8:0000:0000:1234:0:A9FE:133E

■

Eliminate preceding zeros:

2001:DB8:0000:0000:1234:0:A9FE:133E

■

Use the special variable shortcut for multiple 0s:

2001:DB8::1234:0:A9FE:133E

You now also use prefix notation or slash notation when discussing IPv6 networks. For
example, the network of the previous address can be represented as 2001:DB8:0000:0000:
0000:0000:0000:0000. This can also be expressed as 2001:DB8:: /32. The /32 indicates 32
bits of network, and 2001:DB8: is 32 bits of network.