Canon LBP7780CX User Manual page 477

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If you want to use DNS Dynamic Update, specify the following settings.
If you do not want to use the DNS server, proceed to Step 12.
(1) Select the [DNS Dynamic Update] check box.
Using the DNS Dynamic Update function, by registering the [Host Name] and [Domain Name] to the DNS
server, the printer's IP address can be used without being fixed.
(2) Set whether to register the IPv6 address to the DNS server during DNS dynamic updates.
If you select the [Register Manual Address] check box, a manual address is registered to the DNS server.
If you select the [Register Stateful Address] check box, a stateful address is registered to the DNS server.
If you select the [Register Stateless Address] check box, a stateless address is registered to the DNS server.
IMPORTANT
DNS Dynamic Update
DNS Dynamic Update is a function that adds the IP address of the device and the names specified as the host name
and domain name to the DNS server automatically.
This function can be used in the environment in which a Dynamic DNS server is being used.
When using the DNS Dynamic Update function
You need to set the IP address, host name, and domain name of the DNS server.
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Click [OK].