Classic Ethernet

Classic Ethernet is a family of 10 Mbit/s Ethernet standards, which is the first generation of Ethernet standards. In 10BASE-X, the 10 represents its maximum throughput of 10 Mbit/s, BASE indicates its use of baseband transmission, and X indicates the type of medium used. Classic Ethernet includes coax, twisted pair and optical variants. The first Ethernet standard was published in 1983 and classic Ethernet operating at 10 Mbit/s was the dominant form of Ethernet until the first standard for Fast Ethernet was approved in 1995.[1]

Varieties
Name Standard Status Media Connector Transceiver
Module		 Reach
in m		 #
Media
(⇆)		 #
Lambdas
(→)		 #
Lanes
(→)		 Notes
Classic coaxial Ethernet - (Data rate: 10 Mbit/s - Line code: PE - Line rate: 20 MBd - Full-Duplex / Half-Duplex)
10BASE5
Thick Ethernet
DIX Standard		 802.3-1983
(CL8)		 obsolete
09/2003		 Coax
RG-8X
(50 Ω)		 AUI,
N,
Vampire tap		 MAU 500 1 N/A 1 LAN; original standard;
electrical bus topology with collision detection;
uses a single coaxial cable into which you literally tap a connection by drilling into the cable to connect to the core and screen.
10BASE2
Thin Ethernet
ThinNet
Cheapernet		 802.3a-1988
(CL10)		 obsolete
09/2011		 Coax
RG-58
(50 Ω)		 BNC,
EAD/TAE-E		 185 1 N/A 1 LAN; dominant standard from the mid to late 1980s;
electrical bus topology with collision detection;
coaxial cable connects machines together, each machine using a T-connector to connect to its NIC. Requires terminators at each end.
Classic fibre Ethernet - (Data rate: 10 Mbit/s - Line code: PE - Line rate: 20 MBd - Full-Duplex / Half-Duplex)
FOIRL 802.3d-1987
(CL9.9)		 superseded Fibre
850 nm		 ST MAU OF: 1k 2 1 1 original standard for Ethernet over fiber;
uses any optical fiber with up to 4 dB/km attenuation and at least 150 MHz bandwidth;
superseded by 10BASE-FL
10BASE-FL 802.3j-1993
(CL15/18)		 largely
obsolete		 Fibre
850 nm		 ST FDDI: 2k 2 1 1 Nodes
10BASE-FB 802.3j-1993
(CL15/17)		 largely
obsolete		 Fibre
850 nm		 ST FDDI: 2k 2 1 1 synchronous inter-repeater connections
10BASE-FP 802.3j-1993
(CL15/16)		 obsolete Fibre
850 nm		 ST FDDI: 1k 2 1 1 passive, repeaterless star network;
Market Failure, never implemented

Fibre-based standards (10BASE-F)

10BASE-F, or sometimes 10BASE-FX, is a generic term for the family of 10 Mbit/s Ethernet standards using fiber optic cable. In 10BASE-F, the 10 represents a maximum throughput of 10 Mbit/s, BASE indicates its use of baseband transmission, and F indicates that it relies on a medium of fiber-optic cable. The technical standard requires two strands of 62.5/125 µm multimode fiber. One strand is used for data transmission while the other is used for reception, making 10BASE-F a full-duplex technology. There are three different variants of 10BASE-F: 10BASE-FL, 10BASE-FB and 10BASE-FP. Of these only 10BASE-FL experienced widespread use.[2] With the introduction of later standards 10 Mbit/s technology has been largely replaced by faster Fast Ethernet, Gigabit Ethernet and 100 Gigabit Ethernet standards.

FOIRL

Fiber-optic inter-repeater link (FOIRL) is a specification of Ethernet over optical fiber. It was specially designed as a back-to-back transport between repeater hubs to decrease latency and collision detection time, thus increasing the possible network radius. It was replaced by 10BASE-FL.[2]

10BASE-FL

10BASE-FL is the most commonly used 10BASE-F specification of Ethernet over optical fiber. In 10BASE-FL, FL stands for fiber optic link. It replaces the original fiber-optic inter-repeater link (FOIRL) specification, but retains compatibility with FOIRL-based equipment. When mixed with FOIRL equipment, the maximum segment length is limited to FOIRL's 1000 meters.[2]

10BASE-FB

The 10BASE-FB is a network segment used to bridge Ethernet hubs. Here FB abbreviates FiberBackbone. Due to the synchronous operation of 10BASE-FB, delays normally associated with Ethernet repeaters are reduced, thus allowing segment distances to be extended without compromising the collision detection mechanism. The maximum allowable segment length for 10BASE-FB is 2000 meters. This media system allowed multiple half-duplex Ethernet signal repeaters to be linked in series, exceeding the limit on the total number of repeaters that could be used in a given 10 Mbit/s Ethernet system. 10BASE-FB links were attached to synchronous signaling repeater hubs and used to link the hubs together in a half-duplex repeated backbone system that could span longer distances.[2]

10BASE-FP

In 10BASE-FP, FP denotes fibre passive. This variant calls for a non-powered optical signal coupler capable of linking up to 33 devices, with each segment being up to 500 m in length. This formed a star network centered on the signal coupler. There are no devices known to have implemented this standard.[2][3]

See Also

References
  1. "IEEE Standards for Local and Metropolitan Area Networks: Supplement - Media Access Control (MAC) Parameters, Physical Layer, Medium Attachment Units, and Repeater for 100Mb/s Operation, Type 100BASE-T (Clauses 21-30)". IEEE Standards Association. Retrieved 2023-06-04.
  2. Charles E. Spurgeon (2014). Ethernet: The Definitive Guide (2nd ed.). O'Reilly Media. ISBN 978-1-4493-6184-6.
  3. Parker, Tim (2000-07-10). "Obscure standard may make you flip for fibre". ProQuest Computer Science Journals. Rogers Publishing Limited. 13 (11). ProQuest 274984076.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.