The early generation ofEthernet standards had a maximum throughput of10 Mbit/s. In 10BASE-X, the 10 represents its maximum throughput of10 Mbit/s, BASE indicates its use ofbaseband 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 at10 Mbit/s was the dominant form of Ethernet until the first standard forFast Ethernet was approved in 1995.[1]
| Name | Standard | Status | Media | Connector | Transceiver Module | Reach in m | # Media (⇆) | # Lambdas (→) | # Lanes (→) | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| Classiccoaxial 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-8 (50 Ω) | AUI, N, Vampire tap | MAU | 500 | 1 | N/A | 1 | LAN; original standard; electricalbus topology withcollision 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 itsNIC. Requiresterminators at each end. | |
| Classicfibre 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| FOIRL | 802.3d-1987 (CL9.9) | superseded | Fibre 850 nm | ST | MAU | OF: 1k | 2 | 1 | 1 | original standard forEthernet over fiber; uses any optical fiber with up to 4 dB/km attenuation and at least 150 MHz bandwidth; superseded by 10BASE-FL |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, repeaterlessstar network; Market Failure, never implemented | |
10BASE-F, or sometimes10BASE-FX, is a generic term for the family of 10 Mbit/sEthernet standards usingfiber-optic cable. In 10BASE-F, the 10 represents a maximum throughput of 10 Mbit/s, BASE indicates its use ofbaseband transmission, and F indicates that it relies on a medium of fiber-optic cable. The technical standard requires two strands of 62.5/125 μmmultimode fiber. One strand is used for data transmission while the other is used for reception, making 10BASE-F afull-duplex technology. There are three different variants of 10BASE-F:10BASE-FL,10BASE-FB and10BASE-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 fasterFast Ethernet,Gigabit Ethernet and100 Gigabit Ethernet standards.
Fiber-optic inter-repeater link (FOIRL) is a specification of Ethernet over optical fiber. It was specially designed as a back-to-back transport betweenrepeater hubs to decrease latency andcollision detection time, thus increasing the possible network radius. It was replaced by10BASE-FL.[2]
10BASE-FL is the most commonly used 10BASE-F specification of Ethernet overoptical fiber. In 10BASE-FL,FL stands for fiber optic link. It replaces the originalfiber-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]
The 10BASE-FB is anetwork segment used to bridgeEthernet hubs. HereFB abbreviates FiberBackbone. Due to thesynchronous operation of 10BASE-FB, delays normally associated with Ethernetrepeaters 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]
In 10BASE-FP,FP denotesfibre 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 astar network centered on the signal coupler. A LAN implementing this standard was applied as a branch LAN to construct an all-optical fiber hierarchical integrated LAN with a high-speed LAN (FDDI, etc.) as the backbone.[2][3]
Ethernet family oflocal area network technologies | |
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