Advantech OW-1000A Owner's Manual page 29

The subnet mask of the local area network.
Gateway
The IP address of the router on the local area network.
DNS Server
DNS Domain Name System , Penetrates the DNS system, We
may look up its IP by machine domain name, Also may instead look
up its domain name by machine IP
This entry is optional. Enter a DNS Server for the local network.
Figure 4-9
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