An aperture is a hole or an opening through which light is admitted. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.

Dynamic Host Configuration Protocol (DHCP): A system to manage network parameter assignment, commonly used to automatically assign IP addresses on a LAN.

Please see:

http://en.wikipedia.org/wiki/H.264

High-definition (HD) video: generally refers to any video system of higher resolution than standard-definition (SD) video, most commonly at display resolutions of 1280×720 (720p) or 1920×1080 (1080i or 1080p).

Internet Protocol (IP) address:  A numerical identification (logical address) that is assigned to devices participating in a computer network utilizing the Internet Protocol for communication between its nodes.

A composite diaphragm with a central aperture readily adjustable for size, used to regulate the amount of light admitted to a lens or optical system.

A Unix-like computer operating system family which uses the Linux kernel. Linux is one of the most prominent examples of free software and open source development; typically all the underlying source code can be freely modified, used, and redistributed by anyone.

Motion JPEG (MJPEG): Format where each video frame or interlaced field of a digital video sequence is separately compressed as a JPEG image. It is often used in mobile appliances such as digital cameras.

Megapixel (MP): A megapixel is 1 million pixels, and is a term used not only for the number of pixels in an image, but also to express the number of image sensor elements of digital cameras or the number of display elements of digital displays.

Please see: http://en.wikipedia.org/wiki/MPEG4

A node is a critical element of any computer network. It can be defined as a point in a network at which lines intersect or branch, a device attached to a network, or a terminal or other point in a computer network where messages can be transmitted, received or forwarded. A node can be any device connected to a computer network. Nodes can be computers, IP cameras, personal digital assistants (PDAs), cell phones, switches, routers or various other networked devices.

In digital imaging, a pixel (picture element) is the smallest piece of information in an image.

Power over Ethernet (PoE): A system to transfer electrical power, along with data, to remote devices over standard twisted-pair cable in an Ethernet network.

Transmission Control Protocol/Internet Protocol (TCP/IP): The basic communication language or protocol of the Internet.

Unix (officially trademarked as UNIX, sometimes also written as Unix with small caps): A computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs,

The trade name for the popular wireless technology used in home networks, mobile phones, video games and more. In particular, it covers the various IEEE 802.11 technologies (including 802.11n, 802.11b, 802.11g, and 802.11a).

Although referred to by many as Wireless Fidelity, this is untrue. Wi-Fi was invented by Interbrand as it sounded more exciting than "IEEE 802.11b Direct Sequence"