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A Universal Serial Bus (USB) is an external bus (an interconnect) standard that supports data transfer rates of 12 Mbps. A single
USB port can be used to connect up to 127 peripheral devices, such as mouse, modems and keyboards. Introduced in 1996,
USB has completed replaced serial and parallel ports. It also supports plug-and-play installations and hot plugging
Plug-and-play is the ability to add and remove devices to a computer while the computer is running and have the operating
system automatically recognize the change. USB 2.0, which supports data transfer rates of 480 Mbps, has been widely used in
motherboard these days.
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NEC's Virtual Channel Memory (VCM) is a new DRAM core architecture that dramatically improves the memory system's ability
to service multimedia requirements. VCM increases memory bus efficiency and performance of any DRAM technology by
providing a set of fast static registers between the memory core and I/O pins. Using VCM technology results in reduced data
access latency and reduced power consumption.
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802.11 is a specification developed by IEEE and Wireless LAN technology, which is an interface between a wireless client and a
base station or between two wireless clients.
802.11 families include the following specifications and with more coming:
802.11 = 1 or 2 Mbps transmission in the 2.4 GHz band, using either frequency hopping spread spectrum (FHSS) or direct
sequence spread spectrum (DSSS)).
802.11a = 54 Mbps in the 5GHz band, using orthogonal frequency division multiplexing)
802.11b (11 Mbps transmission in the 2.4 GHz band, using direct sequence spread spectrum (DSSS).
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