Network Chico Computer
terms glossary
Some definitions from the Sharpened Glossary
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5-4-3 rule: Applies to
Ethernet running over coaxial cable. The rule states that a network
can have a maximum of five cable segments with four repeaters,
with three of those segments being populated. It is an "end-to-end"
rule which means it governs the number of segments, devices and
so forth between any two nodes on a network. It is not a "total
population" rule. You can have more than five cable segments,
four repeaters and three populated segments on an Ethernet network,
but no more than those numbers between any two possible senders
and receivers on that network.
10Base2: A designation
for 802.3 Ethernet thin coaxial cable (also called thinnet, thinwire
or cheapernet). The 10 indicates bandwidth of 10 Mbps, the Base
indicates it's a baseband transmission technology and the 2 indicates
a maximum segment length for this cable type of 200 meters (actually,
185).
10Base5: A designation
for 802.3 Ethernet thick coaxial cable (also called thicknet
or thickwire). The 10 indicates bandwidth of 10 Mbps, the Base
indicates it's a baseband transmission technology and the 5 indicates
a maximum segment length for this cable type of 500 meters.
10BaseT: A designation
for 802.3 Ethernet twisted-pair cable. The 10 indicates bandwidth
of 10 Mbps, the Base indicates it's a baseband transmission technology
and the T indicates that the medium is twisted-pair. Maximum
segment length for this type of of cable is typically 100 meters
for Category 5 Ethernet cable.
802.1: The IEEE specification
within Project 802 for the OSI reference model and for internetworking
and routing behavior at the Data Link layer where logical addresses
must be translated into their physical counterparts and vice
versa.
802.2: The IEEE specification
within Project 802 for the Logical Link Control (LLC) sublayer
within the Data Link layer of the OSI reference model.
802.3: The IEEE specification
within Project 802 for Collision Sense Multiple Access/Collision
Detection (CSMA/CD) networks. Ethernet users can attempt to access
the medium any time it's perceived as "quiet," but
they must back off and try to transmit again if they detect any
collisions once transmission begins. More commonly called Ethernet.
802.4: The IEEE specification
within Project 802 for token bus LANs which use a straight-line
bus topology for the networking medium, yet circulate a token
to control access to the medium.
802.5: The IEEE specification
within Project 802 for token ring LANs which map a circulating
ring structure onto a physical star and circulate a token to
control access to the medium.
802.6: The IEEE specification
within Project 802 for metropolitan area networks (MANs).
802.7: The IEEE specification
within Project 802 for the Broadband Technical Advisory Group's
findings and recommendations for broadband networking technologies,
media, interfaces and equipment.
802.8: The IEEE specification
within Project 802 for the Fiber-optic Technical Advisory Group's
finding and recommendations for fiber-optic networking technologies,
media, interfaces and equipment.
802.9: The IEEE specification
within Project 802 that addresses hybrid networks which combine
voice and data trafic within the same networking environment.
802.10: The IEEE specification
within Project 802 for network
security.
802.11: The IEEE specification
within Project 802 for wireless
networking. The 802.11 standard first appeared in late 1997.
802.12: The IEEE specification
within Project 802 for high-speed networks including Demand Priority
and 100VG-AnyLAN technologies.
Network Chico Computer
terms glossary
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