ZyXEL Communications Prestige 642, Руководство пользователя

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Prestige 642 ADSL Modem
Internet Access 3-1
Chapter 3
Internet Access
This chapter shows you how to configure the LAN as well as the WAN
of your Prestige for Internet access
.
3.1 Factory Ethernet Defaults
The Ethernet parameters of the Prestige are preset in the factory with the following values:
1. IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits).
These parameters should work for the majority of installations. If you wish to change the factory defaults or
to learn more about TCP/IP, please read on.
3.2 TCP/IP Parameters
3.2.1 IP Address and Subnet Mask
Similar to the houses on a street that share a common street name, the machines on a LAN share one
common network number, also.
Where you obtain your network number depends on your particular situation. If the ISP or your network
administrator assigns you a block of registered IP addresses, follow their instructions in selecting the IP
addresses and the subnet mask.
The subnet mask specifies the network number portion of an IP address. Your Prestige 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 Prestige unless you are instructed to do otherwise.
3.2.2 Private IP Addresses
Every machine on the Internet must have a unique address. If your networks are isolated from the Internet,
e.g., only between your two branch offices, you can assign any IP addresses to the hosts without problems.
However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP
addresses specifically for private networks:
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255