ZyXEL P-660HN-51 User Guide - Page 74
Before You Begin - username password
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Chapter 6 WAN Setup they should also provide a username and password (and service name) for user authentication. WAN IP Address The WAN IP address is an IP address for the ZyXEL Device, which makes it accessible from an outside network. It is used by the ZyXEL Device to communicate with other devices in other 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. Finding Out More See Section 6.4 on page 83 for technical background information on WAN. 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. 74 P-660HN-TxA User's Guide