ZyXEL Communications P-870HW-51a v2 Benutzerhandbuch

Chapter 6 LAN Setup

P-870HW-51a v2 User’s Guide

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.

The subnet mask specifies the network number portion of an IP address. Your 
ZyXEL Device 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 ZyXEL Device unless you are instructed to do otherwise.

DHCP (Dynamic Host Configuration Protocol) allows clients to obtain TCP/IP 
configuration at start-up from a server. This ZyXEL Device has a built-in DHCP 
server capability that assigns IP addresses and DNS servers to systems that 
support DHCP client capability.

RIP (Routing Information Protocol) allows a router to exchange routing 
information with other routers.

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.

DNS (Domain Name System) maps 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 computer before you can access it. The DNS 
server addresses you enter when you set up DHCP are passed to the client 
machines along with the assigned IP address and subnet mask.