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10BASE2
Ethernet specification for thin coaxial cable, transmits
signals at 10 Mbps (megabits per second) with a distance limit of 185 meters per segment.
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10BASE5
Ethernet specification for thick coaxial cable, transmits
signals at 10 Mbps (megabits per second) with a distance limit of 500 meters per segment.
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10BASE-F
Ethernet specification for fiber optic cable, transmits
signals at 10 Mbps (megabits per second) with a distance limit of 2000 meters per segment.
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10BASE-T
Ethernet specification for unshielded twisted pair
cable (category 3, 4, or 5), transmits signals at 10 Mbps (megabits per second) with a distance limit of 100 meters
per segment.
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100BASE-T
Ethernet specification for unshielded twisted pair
cabling that is used to transmit data at 100 Mbps (megabits per second) with a distance limit of 100 meters per
segment.
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1000BASE-TX
Ethernet specification for unshielded twisted pair
cabling that is used to trasmit data at 1 Gbps (gigabits per second) with a distance limitation of 220 meters per
segment.
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16-bit, 32-biat and 64-bit
Pertaining to hardware or software that handles data
16-or 32-bits at a time. The more data a computer can manipulate at one time, the faster that computer will perform.
A computer’s speed can be limited by the slowest hardware or software component, or the one that can handle the
least number of bits at a time. For example, even if 16-bit MS-DOS is run on a CPU capable of manipulating 32-bits
at a time, the necessary segment memory operations will limit the speeds that can be achieved. Current versions
of Windows are mostly a 32-bit operating system, so they can take better advantage of today’s 32-bit CPUs. A 32-bit
CPU has 32-bit internal registers, so it can manipulate data in groups of 32-bits. A 32-bit data bus allows data
to travel between the different system components in groups of 32 bits. A 32-bit memory address bus allows a computer
to directly access over four gigabytes (four billion bytes) of memory, since the maximum value representable by
32 bits is about 4.3 billion. The latest hardware and software are capable handling data of 64-bits at a time.
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3-D Graphics
3-D graphics is the field of computer graphics concerned with generating and displaying three-dimensional
objects in a two-dimensional space (e.g., the display screen).
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802.11
Definition: 802.11 is the generic name of a family
of standards for wireless networking. The numbering system for 802.11 comes from the IEEE, who uses "802"
for many networking standards like Ethernet (802.3).
802.11 standards define rules for communication on wireless local area networks (WLANs). Popular 802.11 standards
include 802.11a, 802.11b and 802.11g.
802.11 was the original standard in this family, ratified in 1997. 802.11 defined WLANs that operate at 1-2 Mbps.
This standard is obsolete today.
Each extension to the original 802.11 appends a unique letter to the name, as follows:
802.11a - 54 Mbps standard, 5 GHz signaling (ratified 1999)
802.11b - 11 Mbps standard, 2.4 GHz signaling (1999)
802.11c - operation of bridge connections (moved to 802.1)
802.11d - worldwide compliance with regulations for use of wireless signal spectrum (2001)
802.11e - Quality of Service (QoS) support (not yet ratified)
802.11f - protocol for communication between access points to support roaming clients (2003)
802.11g - 54 Mbps standard, 2.4 GHz signaling (2003)
802.11h - enhanced version of 802.11a to support European regulatory requirements (2003)
802.11i - security improvements for the 802.11 family (2004)
802.11j - enhancements to 5 GHz signaling to support Japan regulatory requirements (2004)
802.11k - WLAN system management (in progress)
802.11l - skipped to avoid confusion with 802.11i
802.11m - maintenance of 802.11 family documentation
802.11n - future 100+ Mbps standard (in progress)
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802.16
Commonly referred to as WiMAX or less commonly as
WirelessMAN™ or the Air Interface Standard, IEEE 802.16 is a specification for fixed broadband wireless MANs (Metropolitan
Access Networks) that use a point-to-multipoint architecture. Published on April 8, 2002, the standard defines
the use of bandwidth between the licensed 10GHz and 66GHz and between the 2GHZ and 11GHz (licensed and unlicensed)
frequency ranges and defines a MAC layer that supports multiple physical layer specifications customized for the
frequency band of use and their associated regulations. 802.16 supports very high bit rates in both uploading to
and downloading from a base station up to a distance of 30 miles to handle such services as VoIP, IP connectivity
and TDM voice and data.
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Any questions or inquiries may be e-mailed to keppanet@hotmail.com.
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