ZyXEL NBG-416N 사용자 가이드

Appendix A IP Addresses and Subnetting

NBG-416N User’s Guide

that you entered. You don't need to change the subnet mask computed by the 
NBG-416N unless you are instructed to do otherwise.

Every machine on the Internet must have a unique address. If your networks are 
isolated from the Internet (running only between two branch offices, for example) 
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

You can obtain your IP address from the IANA, from an ISP, or it can be assigned 
from 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.

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.