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ZyXEL G-560 User’s Guide
5-2 System Screens
Regardless of your particular situation, do not create an arbitrary IP address;
always follow the guidelines above. For more information on address assignment,
please refer to RFC 1597, Address Allocation for Private Internets and RFC 1466,
Guidelines for Management of IP Address Space.
5.2.2 IP Address and Subnet Mask
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.
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.
If the ISP did not explicitly give you an IP network number, then most likely you have a single user account
and the ISP will assign you a dynamic IP address when the connection is established. The Internet Assigned
Number Authority (IANA) reserved this block of addresses specifically for private use; please do not use any
other number unless you are told otherwise. Let's say you select 192.168.1.0 as the network number; which
covers 254 individual addresses, from 192.168.1.1 to 192.168.1.254 (zero and 255 are reserved). In other
words, the first three numbers specify the network number while the last number identifies an individual
computer on that network.
Once you have decided on the network number, pick an IP address that is easy to remember, for instance,
192.168.1.2, for your G-560, but make sure that no other device on your network is using that IP address.
The subnet mask specifies the network number portion of an IP address. Your G-560 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 G-560 unless you are instructed to do otherwise.
5.3 Configuring System Settings
Click SETTINGS, then SYSTEM to open the System Settings screen.