A high definition recording resolution which is available on some DVRs. The resolution is 704 x 480.

DDNS stands for Dynamic DNS. A DDNS provider will give you a hostname to use to access your camera system instead of an IP address. It is used as a work around when a static IP isn’t feasible.

From the Del User menu, you can delete current users from being authorized to use the DVR.

The Device ID on a DVR is an identifier that you can set in order to keep track of multiple DVRs. It is recommended to leave this at the default setting.

The Dynamic Host Configuration Protocol (DHCP) is a network configuration protocol for hosts on Internet Protocol (IP) networks. Computers that are connected to IP networks must be configured before they can communicate with other hosts. The most essential information needed is an IP address, and a default route and routing prefix. DHCP eliminates the manual task by a network administrator. It also provides a central database of devices that are connected to the network and eliminates duplicate resource assignments.

A camera that has the lens encased in a domed window. This is often used for cameras that are indoors because they are more aesthetically pleasing.

(Daylight Savings Time)- this setting allows you to configure your DVR to adjust the time for daylight savings time automatically

A DVR is a digital video recorder. It is a device or software that records video in a digital format to a hard drive, flash drive, memory card, or a networked mass storage device.