ZyXEL Communications P-660RU-Tx User Manual page 76

Chapter 8 LAN Setup
Subnet Mask
Subnet masks determine the maximum number of possible hosts on a network.
You can also use subnet masks to divide one network into multiple sub-networks.
DHCP
A DHCP (Dynamic Host Configuration Protocol) server can assign your P-660RU-Tx
an IP address, subnet mask, DNS and other routing information when it's turned
on.
RIP
RIP (Routing Information Protocol) allows a router to exchange routing
information with other routers.
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 1.
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 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.
DNS
DNS (Domain Name System) is for mapping a domain name to its corresponding
IP address and vice versa. The DNS server is extremely important because
without it, you must know the IP address of a networking device before you can
access it.
Finding Out More
See Section 8.3 on page 79 for technical background information on LANs.
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P-660RU-Tx User's Guide