1. Destination address type of IPv6 datagram:
Unicast, Multicast, Anycast
2. Both hosts and routers that implement IPv6 are called nodes.
3. Each address occupies 128 bits.
4. Using colon hexadecimal notation, represent each 16-bit value as a hexadecimal value, separated by colons.
Colon hex notation:
(1) It is allowed to omit the 0 in front of the number.
(2) Zero compression is allowed , that is, a series of zeros can be replaced by a pair of colons. E.g,
FF05: 0: 0: 0: 0: 0: 0: B3
Compressible to:
FF05 :: B3
Specifies that zero-compression can only be used once at any address.
(3) The colon hexadecimal notation can be combined with the suffix of the dotted decimal notation. E.g,
0:0:0:0:0:0:128.10.2.1
Then use zero compression to get:
::128.10.2.1
Other examples:
FF01:0:0:0:0:0:0:101 (multicast address) is recorded as FF01::101
0:0:0:0:0:0:0:1 (loopback address) is recorded as ::1
0:0:0:0:0:0:0:0 (address not specified) is recorded as ::
(4) The slash notation for CIDR is still available. For example, the 60-bit prefix 12AB00000000CD3 can be written as
12AB:0000:0000:CD30:0000:0000:0000:0000/60
or 12AB::CD30:0:0:0:0/60
or 12AB:0:0:CD3-::/60