D-Link AC750 User Manual page 38

Section 3 - Configuration
Primary DNS Server: Enter the Primary DNS IP address used here.
Secondary DNS Server: Enter the Secondary DNS IP address used here. This
field is normally optional. Only one DNS address is re-
quired for a functional Internet connection, but using a
second DNS address provides more stability.
MTU: Maximum Transmission Unit - you may need to change
the MTU for optimal performance with your specific
ISP. 1400 is the default MTU.
MAC Address: The default MAC Address is set to the Internet port's
physical interface MAC address on the Broadband
Router. It is not recommended that you change the
default MAC address unless required by your ISP. You
can use the Clone Your PC's MAC Address button to
replace the Internet port's MAC address with the MAC
address of your Ethernet card.
D-Link DIR-810L User Manual 34