404-8-1. Network Types4-8-1-1. DHCPAn IP address is automatically assigned by the DHCP server, which also assigns an IP addressand other parameters to new devices.4-8-1-2. STATICIP address, Subnet Mask, Gateway, and DNS are manually assigned by the user.• IP ADDRESS: The fixed IP address of the NS unit.• SUBNET MASK: The subnet mask for the LAN.• GATEWAY: The IP address of the Gateway.• DNS (PRIMARY) The primary address of Domain Name Server• DNS (SECINDARY): The secondary address of Domain Name ServerNOTEUnless DNS is properly set, the DDNS and email features will not work.4-8-2. DDNSDDNS (Dynamic Domain Name System) allows a DNS name to be constantly synchronisedwith a dynamic IP address. It allows using a dynamic IP address to be associated with a staticdomain name.Once the setting is complete, the DDNS address will be:http://hostname.okddns.comFor example, if you enter the host name as “NVR”, then the address will be:http://NVR.okddns.comSelect NETWORK>DDNS. The menu displays as below.