ZyXEL P-335 Plus User Guide - Page 50
WAN IP Address Assignment, IP Address and Subnet Mask - broadband router
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P-335 Plus User's Guide The following table describes the labels in this screen Table 14 Wizard Step 2: Your IP Address LABEL Get automatically from your ISP Use fixed IP address provided by your ISP Back Next Exit DESCRIPTION Select this option If your ISP did not assign you a fixed IP address. This is the default selection. If you choose this option, skip directly to section 3.3.9. Select this option if you were given IP address and/or DNS server settings by the ISP. The fixed IP address should be in the same subnet as your broadband modem or router. Click Back to return to the previous screen. Click Next to continue. Click Exit to close the wizard screen without saving. 3.3.5 WAN IP Address Assignment Every computer on the Internet must have a unique IP address. If your networks are isolated from the Internet, for instance, 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. Table 15 Private IP Address Ranges 10.0.0.0 172.16.0.0 192.168.0.0 - 10.255.255.255 - 172.31.255.255 - 192.168.255.255 You can obtain your IP address from the IANA, from an ISP or have it assigned by a private network. If you belong to a small organization and your Internet access is through an ISP, the ISP can provide you with the Internet addresses for your local networks. On the other hand, if you are part of a much larger organization, you should consult your network administrator for the appropriate IP addresses. Note: 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. 3.3.6 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. 50 Chapter 3 Connection Wizard