Before You Begin - ZyXEL Communications P-660H-61 User Manual

Chapter 6 WAN Setup
networks. It can be static (fixed) or dynamically assigned by the ISP each time the ZyXEL Device
tries to access the Internet.
If your ISP assigns you a static WAN IP address, they should also assign you the subnet mask and
DNS server IP address(es) (and a gateway IP address if you use the Ethernet or ENET ENCAP
encapsulation method).
Multicast
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1 recipient)
or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to a group of
hosts on the network - not everybody and not just one.
IGMP
IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership
in a Multicast group - it is not used to carry user data. There are three versions of IGMP. IGMP
version 2 and 3 are improvements over version 1, but IGMP version 1 is still in wide use.
IPv6
IPv6 (Internet Protocol version 6), is designed to increase IP address space and enhance features.
The ZyXEL Device supports IPv4/IPv6 dual stack and can connect to IPv4 and IPv6 networks. See
(Appendix E on page
Finding Out More
See Section 6.4 on page 104

6.1.3 Before You Begin

You need to know your Internet access settings such as encapsulation and WAN IP address. Get this
information from your ISP.
94
341) for more information about IPv6.
for technical background information on WAN.
ADSL Router Series User's Guide