Netgear WGX102 참조 매뉴얼

B-8

Network, Routing, Firewall, and Basics

In the past, if multiple computers on a LAN needed to access the Internet simultaneously, you had 
to obtain a range of IP addresses from the ISP. This type of Internet account is more costly than a 
single-address account typically used by a single user with a modem, rather than a router. The 
WGX102 Wall-Plugged Range Extender employs an address-sharing method called Network 
Address Translation (NAT). This method allows several networked computers to share an Internet 
account using only a single IP address, which may be statically or dynamically assigned by your 
ISP.

The router accomplishes this address sharing by translating the internal LAN IP addresses to a 
single address that is globally unique on the Internet. The internal LAN IP addresses can be either 
private addresses or registered addresses. For more information about IP address translation, refer 
to RFC 1631, The IP Network Address Translator (NAT).

The following figure illustrates a single IP address operation.

 

7786EA

192.168.0.2

192.168.0.3

192.168.0.4

192.168.0.5

192.168.0.1

172.21.15.105

Private IP addresses
assigned by user

Internet

IP addresses
assigned by ISP