ZyXEL P-794H User Guide - Page 90
Before You Begin, Multicast, Finding Out More
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Chapter 7 WAN Setup devices in other networks. It can be static (fixed) or dynamically assigned by the ISP each time the P-794H 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). DHCP A DHCP (Dynamic Host Configuration Protocol) server can assign your P-794H an IP address, subnet mask, DNS and other routing information when it's turned on. 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. With ATM, a high QoS (Quality of Service) can be guaranteed. ATM uses a connection-oriented model and establishes a virtual circuit (VC) between two endpoints before the actual data exchange begins. 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. Finding Out More See Section 7.6 on page 127 for technical background information on WAN. 7.1.2 Before You Begin You need to know your Internet access settings such as encapsulation and WAN IP address. Get this information from your ISP. 90 P-794H User's Guide