Loopback Address; Multicast Address - ZyXEL Communications GS2210-8 User Manual

Global Address
A global address uniquely ident ifies a device on t he I nt ernet . I t is sim ilar t o a " public I P address" in
I Pv4. A global unicast address st art s wit h a 2 or 3.
Unspecified Address
An unspecified address ( 0: 0: 0: 0: 0: 0: 0: 0 or : : ) is used as t he source address when a device does
not have it s own address. I t is sim ilar t o " 0.0.0.0" in I Pv4.

Loopback Address

A loopback address ( 0: 0: 0: 0: 0: 0: 0: 1 or : : 1) allows a host t o send packet s t o it self. I t is sim ilar t o
" 127.0.0.1" in I Pv4.

Multicast Address

I n I Pv6, m ult icast addresses provide t he sam e funct ionalit y as I Pv4 broadcast addresses.
Broadcast ing is not support ed in I Pv6. A m ult icast address allows a host t o send packet s t o all host s
in a m ult icast group.
Mult icast scope allows you t o det erm ine t he size of t he m ult icast group. A m ult icast address has a
predefined prefix of ff00: : / 8. The following t able describes som e of t he predefined m ult icast
addresses.
Table 208 Predefined Mult icast Address
MULTICAST ADDRESS
FF01:0:0:0:0:0:0:1
FF01:0:0:0:0:0:0:2
FF02:0:0:0:0:0:0:1
FF02:0:0:0:0:0:0:2
FF05:0:0:0:0:0:0:2
FF05:0:0:0:0:0:1:3
The following t able describes t he m ult icast addresses which are reserved and can not be assigned
t o a m ult icast group.
Table 209 Reserved Mult icast Address
MULTICAST ADDRESS
FF00:0:0:0:0:0:0:0
FF01:0:0:0:0:0:0:0
FF02:0:0:0:0:0:0:0
FF03:0:0:0:0:0:0:0
FF04:0:0:0:0:0:0:0
FF05:0:0:0:0:0:0:0
FF06:0:0:0:0:0:0:0
FF07:0:0:0:0:0:0:0
FF08:0:0:0:0:0:0:0
FF09:0:0:0:0:0:0:0
Appendix C IPv6
DESCRIPTION
All host s on a local node.
All rout ers on a local node.
All host s on a local connect ed link.
All rout ers on a local connect ed link.
All rout ers on a local sit e.
All DHCP severs on a local sit e.
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