D-Link DI-714 - Manual (Page 26)

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Select Dynamic IP if your ISP has not given you a unique IP address
and you receive an automatic IP address each time you connect to your ISP.
The rest of the settings related to your connection are retrieved
automatically each time you connect to the Internet.
Select Static IP if your ISP assigns you an IP address. This means
that your ISP has given you an IP address that you will use to connect to
the Internet through their service. If you select Static IP, you will need to
enter the correct values for the IP Address, Subnet Mask and Gateway in
the fields provided.
Select
PPPoE if your ISP uses the Point-to-Point over Ethernet
protocol to authenticate a username and password and then automatically
assign you an IP Address. PPP over Ethernet (PPPoE) is a non-standard
method of connecting to your ISP to obtain an IP address. It relies upon a
software client that is provided by the ISP. If you have a broadband
connection and login to your ISP like you would do with a dial-in modem,
then you are probably using PPPoE. If you are simply connected to the
Internet when you turn on your computer, you probably are not. The
safest way to check is to call your ISP or read the documentation provided
when you signed up for your Internet service. If you select PPPoE, you
will need to enter the correct values for your User Name and Password in
the fields provided. The DNS section needs to be set to the correct option
in order for the DI-714 to resolve domain name information in URL’s.
Select Dynamic DNS if your ISP provides the DNS information
much in the same way as you receive an IP Address.
Select Static DNS if you were given the DNS server information
when you signed with your ISP. Click on the Save & Restart button to
save your settings.