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100BaseT
Fast Ethernet is Ethernet
that runs at 100Mbps as opposed to the standard 10Mbps. There are two
primary standards that have been proposed: 100Base-T and 100VG-AnyLAN.
100Base-T is also referred to as the IEEE 802.3u standard. The 100VG-AnyLAN
standard is in the hands of a new committee, the IEEE 802.12. Fast Ethernet
and the 100Base-T standard are synonymous terms.
100BaseTX
100Base-TX is the
specification that describes how to run 100Mbps Fast Ethernet over Category
5 UTP. Category 5 UTP is the most popular type of cabling used in LANs
today.
10Base2
10Base2 is the
IEEE standard for 10Mbps baseband Ethernet over coaxial cable (RG-58). 185 meters is the
maximum distance for this standard. 10Base2 is also referred to as
"Thinnet," "Thinlan" and "Cheapernet." 10Base2
or Thinnet uses twist-on BNC connectors to attach to devices. Each device
that attaches to the cable uses a T-connector to daisy chain to the next
device. The final T-connector in the series must include a termination
plug. In most 10Base2 implementations the Network Interface Card contains
the transceiver functions.
10Base5
10Base5 is the
IEEE standard for 10Mbps baseband Ethernet over coaxial cable. 500 meters is the
maximum distance for this type of cable. Also called "Thicknet"
and "Yellow Wire." This type of physical cable is typically used
as the backbone media for Ethernet networks.
10BaseF
10BaseF is the
Ethernet 10Mbps standard for star configuration Ethernet using fiber optic
cable.
10Base
T
Standard for Ethernet media using twisted pair similar to modular telephone
cabling. 10Base T networks use twisted pair between the workstation and a
hub. The hub is then attached to the backbone of the network. This
arrangement isolates each workstation from the backbone. The segment that
extends from the workstation to the hub is often referred to as the
"home run."
2B+D
This is the common way of stating ISDN's BRI interface. 2B is short for two
bearer channels. D stands for a data channel. BRI is the Basic Rate
Interface in ISDN. On ISDN circuit is composed of two 64Kbps bearer
channels which may be used for voice or data, and one 16Kbps data channel.
The data channel is also used for signaling.
23B+D
The ISDN Primary
Rate Interface. It is a circuit consisting of 23 64Kbps channels for
carrying voice, data, and video and a data channel used for carrying
signaling information. It is similar to T1 signaling.
802.1
802.1 is the IEEE
standard for overall architecture of LANs and internetworking.
802.1B
802.1B is the
IEEE standard for network management.
802.1D
MAC layer
standard for inter-LAN bridges. The 802.1D standard encompasses the
interconnection of 802.3: 802.4 and 802.5 LANs.
802.2
802.2 is the
standard for the upper Data Link Layer sublayer also known as the Logical
Link Control layer. It is used with the 802.3, 802.4 and 802.5 standards
(lower DL sublayers).
802.3
Standard for
CSMA/CD (Carrier Sense Multiple Access with Collision Detection). Both
Ethernet and Starlan follow this standard. It encompasses both the MAC and
Physical Layer standards. At the Data Link Layer, it is one of three
primary data link sublayers. The Physical Layer specifications depend on
the type of media used (10Base T, 10Base 5, etc.). 10Mbps is the
transmission rate for this standard.
802.4
Standard for the
Data Link and Physical Layer for the Token Bus protocol. It is typically
used with the Manufacturing Automation Protocol (MAP) developed by General
Motors. 10Mbps is the typical transmission speed for this standard. See the
LAN Architectures section of this document for further details on this
subject.
802.5
Standard for the
token-passing (Token Ring) access method of LAN protocols. It encompasses
both the Data Link and Physical Layer standards. Transmission speeds
include both 16Kbps and 4Kbps.
802.6
The 802.6
standard is the IEEE standard for Metropolitan Area Networks (MANs) also
known as Distributed Queue Dual Bus (DQDB).
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