Matrox 4Sight EV6 Installation And Hardware Reference page 62

62 Appendix A: Hardware glossary
• IP address.
Internet protocol address. The electronic address of a computer or other device on
a TCP/IP network, which should be unique for all devices on the network to
function properly. Devices can have either a permanent or dynamically assigned
address. The IP address is a dot address that is written as four sets of numbers
separated by periods, also called dotted quad notation (for example,
203.142.62.2). The TCP/IP packet uses 32 bits to hold the IP address.
• LAN.
Local area network. A LAN is a group (or network) of computers and other devices
that are connected together to share the resources (files, printers, devices, and other
services such as internet access) of a single workstation or server within a small
geographical area. The main LAN connection technology used is Ethernet cable,
which connects users (clients) to the LAN's server. Clients download applications
and/or services from the server, and then run or use them from their local
computer.
• PoE.
Power-over-Ethernet. A network connection that passes electrical power along with
data using Ethernet cabling. A PoE connection can power devices external to your
unit, such as a network-aware camera or telephone.
• POST.
Power-on self test. This test is performed by the UEFI, as soon as the computer is
turned on. POST gathers information about what the unit contains, and ensures
that everything is working properly. It works by performing a list of tasks related
to testing the RAM, the on-board hardware, the expansion boards, the mass
storage devices, and other installed components. If all the tasks are completed, the
UEFI will proceed to boot the operating system. If a task cannot be completed,
POST will report an error to the UEFI, and a message will be displayed.
• Quadrature encoder.
An encoder with a quadrature output. It transmits a two-bit code (also known as
Gray code) on two wires for each change in position of a rotating shaft (rotary
encoder), or of a sensor along a scale (linear encoder). For a given direction, the