DNS is a naming system that translates between domain names (www.cradlepoint.com, for example) and Internet IP addresses (206.207.82.197). A DNS server acts as an Internet phone book, translating between names that make sense to people and the more complex numerical identifiers. The DNS page for the device has these distinct functions:
DNS Settings: By default your router is set to automatically acquire DNS servers through your Internet provider (Automatic). DNS Settings allows you to specify DNS servers of your choosing instead (Static).
Split DNS: Allows you to direct DNS requests for the specified domain name(s) to the specified server(s).
Dynamic DNS Configuration: Allows you to host a server (Web, FTP, etc.) using a domain name that you have purchased (www.example.com) with your dynamically assigned IP address.
Known Hosts Configuration: Allows you to map a name (printer, scanner, laptop, etc.) to an IP address of a device on the network.