Before You Begin - ZyXEL Communications P-660RU-Tx User Manual

IGMP
Internet Group Multicast Protocol (IGMP) 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 is an improvement over version
1, but IGMP version 1 is still in wide use. IGMP version 3 supports source filtering,
reporting or ignoring traffic from specific source address to a particular host on the
network.
Finding Out More
See Section 7.3 on page 70

7.1.3 Before You Begin

You need to know your Internet access settings such as encapsulation and WAN IP
address. Get this information from your ISP.
P-660RU-Tx User's Guide
for technical background information on WAN.
Chapter 7 Internet Setup
61