Before You Begin; The Internet Access Setup Screen - ZyXEL Communications P-793H v3 User Manual

WAN IP Address
The WAN IP address is an IP address for the P-79X, which makes it accessible from an outside
network. It is used by the P-79X to communicate with other devices in other networks. It can be
static (fixed) or dynamically assigned by the ISP each time the P-79X 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).
ATM
Asynchronous Transfer Mode (ATM) is a LAN and WAN networking technology that provides high-
speed data transfer. ATM uses fixed-size packets of information called cells.
PTM
Packet Transfer Mode (PTM) is packet-oriented and supported by the VDSL2 standard. In PTM,
packets are encapsulated directly in the High-level Data Link Control (HDLC) frames. It is designed
to provide a low-overhead, transparent way of transporting packets over DSL links, as an
alternative to ATM.
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 and 2 are still in wide use.
Finding Out More
See Section 6.5 on page 59

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.

6.2 The Internet Access Setup Screen

Use this screen to change your P-79X's WAN settings. Click Network > WAN > Internet Access
Setup. The screen differs by the WAN type and encapsulation you select.
Chapter 6 WAN Setup
for technical background information on WAN.
P-79X Series User's Guide
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