87 [H] HTTP (Hypertext Transfer Protocol)

Protocol for transmitting data over a network.

86 [G] GoP (Group of Pictures)

In MPEG video encoding, a group of pictures, or GoP, specifies the order in which intra-frames and inter-frames are arranged.

85 [F] Fast Address

A system for setting the address of the camera remotely from the control system.

84 [F] F-Number (aka Focal ration, f-ratio, f-stop, or relative aperture) in optics

The f-number of an optical system is the ration of the Len’s focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography.

83 [D] DNS (Domain Name System)

An internet service that translates domain names into IP addresses. Because domain names are alphabetic, they’re easier to remember.

82 [D] DNR (Dynamic Noise Reduction)

Image noise is interference in the video signal that shows up as grainy specks. It can be caused by low lighting situation, a nearby power interference, heat, or device algorithms DNR is a technique of removing image noise from a video signal by applying a digital comb filter. It makes images clearer and reduces video file size.

81 [D] DHCP (Dynamic Host Configuration Protocol)

Assigning dynamic IP addresses to devices on a network.

80 [D] Duplex

Term used to define the direction of data transmission between two parties. Half-duplex allows data transmission in both directions but not simultaneously. Full-duplex allows simultaneous data transmission.

79 [D] DWD (Dust and Water proof Design)

Dust and Water proof Design

78 [C] CIF (Common Intermediate Format)

Video format with 352 x 240/288 pixels.