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Chapter 4: Configuration
DNS
A Domain Name System (DNS) contains a mapping table for domain name and IP
addresses. On the Internet, every host has a unique and user-friendly name (domain
name) such as www.abc.com and an IP address. An IP address is a 32-bit number in the
form of xxx.xxx.xxx.xxx, for example 192.168.1.254. You can think of an IP address as a
telephone number for devices on the Internet, and the DNS will allow you to find the
telephone number for any particular domain name. As an IP Address is hard to remember,
the DNS converts the friendly name into its equivalent IP Address.
You can obtain a Domain Name System (DNS) IP address automatically if your ISP has
provided it when you logon. Usually when you choose PPPoE or PPPoA as your WAN -
ISP protocol, the ISP will provide the DNS IP address automatically. You may leave the
configuration field blank. Alternatively, your ISP may provide you with an IP address of
their DNS. If this is the case, you must enter the DNS IP address.
If you choose one of the other three protocols ─ RFC1483 Routed/Bridged and IPoA
check with your ISP, it may provide you with an IP address for their DNS server. You must
enter the DNS IP address if you set the DNS of your PC to the LAN IP address of this
router.
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