What You Need To Know - ZyXEL Communications P-2812HNU-51c User Manual

Chapter 6 LAN Setup

6.2 What You Need To Know

IP Address
Similar to the way houses on a street share a common street name, so too do
computers on a LAN share one common network number. This is known as an
Internet Protocol address.
Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your P-
2812HNU-51c will compute the subnet mask automatically based on the IP
address that you entered. You don't need to change the subnet mask computed by
the P-2812HNU-51c unless you are instructed to do otherwise.
DHCP
DHCP (Dynamic Host Configuration Protocol) allows clients to obtain TCP/IP
configuration at start-up from a server. This P-2812HNU-51c has a built-in DHCP
server capability that assigns IP addresses and DNS servers to systems that
support DHCP client capability.
DHCP Relay
You can also configure the P-2812HNU-51c to relay client DHCP requests to a
DHCP server and the server's responses back to the clients.
RIP
RIP (Routing Information Protocol) allows a router to exchange routing
information with other routers.
Multicast and IGMP
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 (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 two versions 1 and 2. IGMP version 2 is an improvement over version 1
but IGMP version 1 is still in wide use.
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P-2812HNU-51c User's Guide