Indicates the type of address. This type is derived from the
prefixes defined below, so this is really just a more
user-friendly manner of presenting the address type.
unspecified(1)
The unspecified address; does not really belong
in the address table. Prefix 00.00.00.00.00.00.00.00-64.
loopback(2)
The loopback address; always assigned to the local node.
Prefix 00.00.00.00.00.00.00.01-64.
local(3)
Site local addresses, prefix 00.00.00.00.00.00.00.00-16
(except the unspecified and loopback addresses).
multicast(4)
Multicast addresses, prefix
FF.00.00.00.00.00.00.00-8.
global(5)
Global addresses, all other prefixes.