PLANET WDRT-750AC - Manual (Page 43)

User Manual of WDRT-750AC
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 Primary DNS
Address:
Enter the necessary DNS address provided by your ISP.
 Secondary DNS
Address:
Enter the other DNS address if your ISP provides you with 2 such
addresses, and it is optional.
 MTU: The maximum transmission unit. You can keep it as defaults.
Auto connection: The system automatically keeps dialing for WAN
connection once the connection is broken.
Manual connection: Manually dial to connect the WAN once
powering on the Router.  Connection mode:
Connection in use: The system automatically establishes a
connection when a network access request from the LAN is
received.
5.5.5 L2TP
Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPN) or as
part of the delivery of services by ISPs.
Figure 5-5-4