Panasonic WV-NP472 - Manual (Page 29)

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Host name Refer to your Internet service provider and set the designated
host name if required.
DNS Set to ON when using the DNS server.
Primary server No setting required
Secondary server Set the IP address of DNS when using the DNS server.
Refer to your internet Internet service provider for the IP
address of the DNS. Primary and secondary IP addresses
can be set for the DNS.
DHCP Set to ON if the router uses DHCP.