Which of the following defines power management for various types of computers and peripherals?
A.
PCIe
B.
HDMI
C.
ACPI
D.
PCI
Explanation:
Answer option C is correct.
The Advanced Configuration and Power Interface (ACPI) is a power-management specification
developed by Intel, Microsoft, and Toshiba. It enables an operating system to control the amount of
power supplied to each device attached to a computer by turning off peripheral devices when they
are not in use. It defines power management on a wide range of mobile, desktop, and server
computers and peripherals. It also enables manuurers to produce computers that automatically
power up as soon as a user touches the keyboard. Answer option B is incorrect. HDMI stands for
High-Definition Multimedia Interface. It is a standard, uncompressed, and all-digital audio/video
interface. HDMI is capable of delivering the highest quality digital video and multi-channel digital
audio on a single cable. It provides an interface between any audio/video sources, such as a DVD
player or a computer and a digital television (DTV) or video monitor. HDMI transmits all ATSC HDTV
standards and supports 8-channel digital audio, with extra bandwidth to accommodate future
enhancements. HDMI has two types of connectors: Type A and Type B. Type A and Type B
connectors use 19 pins and 29 pins, respectively. The Type B connector is designed for very highresolution displays that are expected in near future.
Answer option D is incorrect. Peripheral Component Interconnect (PCI) is a high-performance, 32-bit
or 64-bit bus designed to be used with devices that have high bandwidth requirements, such as the
display subsystem.
Answer option A is incorrect. PCI Express (PCIe), also known as 3rd Generation I/O (3GIO), is a type
of computer bus. It is a new I/O bus technology that has more bandwidth than PCI and AGP slots. It
uses two low-voltage differential pairs, at 2.5Gb/s in each direction. It is designed to replace PCI and
AGP expansion slots. The bus is available in several different bus widths: x1, x2, x4, x8, x12, x16, and
x32. PCIe is able to transfer data in both directions at a time. PCIe hardware will work on operating
systems that support PCI.
Reference:
TechNet, Contents: “ACPI”