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10BASE2 ( also known as cheapernet, thin Ethernet, thinnet, and thinwire ) is a variant of Ethernet that uses thin coaxial cable ( RG-58A / U or similar, as opposed to the thicker RG-8 cable used in 10BASE5 networks ), terminated with BNC connectors.
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10BASE2 and also
For this reason, 10BASE2 networks could be difficult to maintain and were often replaced by 10BASE-T networks, which ( provided category 5 cable or better was used ) also provided a good upgrade path to 100BASE-TX.
10BASE2 networks cannot generally be extended without breaking service temporarily for existing users and the presence of many joints in the cable also makes them very vulnerable to accidental or malicious disruption.
At the time, Ethernet systems usually were 10BASE2, also known as thinnet.
Some hubs may also come with a BNC and / or Attachment Unit Interface ( AUI ) connector to allow connection to legacy 10BASE2 or 10BASE5 network segments.
10BASE2 and thin
RG-58 in versions RG-58A / U or RG-58C / U was once widely used in " thin " Ethernet ( 10BASE2 ), where it provides a maximum segment length of 185 meters.
10BASE2 and Ethernet
During the mid to late 1980s this was the dominant 10 Mbit / s Ethernet standard, but due to the immense demand for high speed networking, the low cost of Category 5 Ethernet cable, and the popularity of 802. 11 wireless networks, both 10BASE2 and 10BASE5 have become increasingly obsolete, but still exist in some locations.
Both 10BASE2 and 10BASE5 became obsolete after the introduction of Ethernet over twisted pair.
CSMA / CD was used in now obsolete shared media Ethernet variants ( 10BASE5, 10BASE2 ) and in the early versions of twisted-pair Ethernet which used repeater hubs.
Transceivers are called Medium Attachment Units ( MAUs ) in IEEE 802. 3 documents and were widely used in 10BASE2 and 10BASE5 Ethernet networks.
) In the market 10BROAD36 equipment was not developed by many vendors nor deployed in many user networks as compared to equipment for IEEE 802. 3 / Ethernet baseband standards such as 10BASE5 ( 1983 ), 10BASE2 ( 1985 ), 10BASET ( 1990 ), etc.
* Ethernet physical layer Including 10BASE-T, 10BASE2, 10BASE5, 100BASE-TX, 100BASE-FX, 100BASE-T, 1000BASE-T, 1000BASE-SX and other varieties
In the original 10BASE5 and 10BASE2 Ethernet varieties, a segment would therefore correspond to a single coax cable and any devices tapped into it.
Likewise, traditional Ethernet ( 10BASE5 and 10BASE2, but not the more modern 10BASE-T ) are natural broadcast media — all the nodes are attached to a single long cable and a packet transmitted by one device is seen by every other device attached to the cable.
Thus, hub-based twisted-pair Ethernet is generally more robust than coaxial cable-based Ethernet ( e. g. 10BASE2 ), where a misbehaving device can adversely affect the entire collision domain.
10BASE2 and is
The name 10BASE2 is derived from several characteristics of the physical medium.
The maximum practical number of nodes that can be connected to a 10BASE2 segment is limited to 30.
In a 10BASE2 network, each segment of cable is connected to the transceiver ( which is usually built into the network adaptor ) using a BNC T-connector, with one segment connected to each female connector of the T.
These characteristics mean that 10BASE2 is ideal for a small network of two or three machines, perhaps in a home where easily concealed wiring may be an advantage.
10BASE2 and uses
Additionally, Apple's 10BASE2 cables were not really feasible for all uses since they only came in fixed lengths and the ends were not detachable, making it very difficult to wire them through walls.
10BASE2 and coaxial
For 10BASE2 the connection to the coaxial cable was typically made with a single BNC connector to which a T-piece was attached.
10BASE2 and cable
10BASE2 cable showing BNC Connector end.
10BASE2 cable with BNC T-Connector.
10BASE2 cable end Terminator.
Apple AAUI Transceiver for 10BASE2 with cable
10BASE2 cable end Terminator.
10BASE2 and used
Antenna cables are sometimes used for internet connections ; however RG-6 should not be used for 10BASE2 ( which should use RG-58 ) as the impedance mismatch can cause phasing problems with the baseband signal.
* A hub with a 10BASE2 port can be used to connect devices that only support 10BASE2 to a modern network.
10BASE2 and networks
Unfortunately for 10BASE2, by the time multiple home computer networks became common, the format had already been practically superseded.
10BASE2 networks absolutely must have proper termination with a 50 ohm BNC terminator.
10BASE2 and with
( The IEEE rounded 185 up to 200 to come up with the name 10BASE2, for consistency with the general standard ).
For backwards compatibility with equipment which still has external AUI interfaces, MAUs are still available with 10BASE2 or 10BASET connections.
10BASE2 and BNC
A FriendlyNet 10BASE2 system did not use BNC T-connectors or separate 50 Ω terminators.
10BASE2 and connectors
Unfortunately, when mixing and matching Apple and non-Apple 10BASE2 devices, there were many seemingly natural configurations of cables and connectors which would cause the network to become unreliable or unusable in the area, reducing the value of the complex and proprietary Apple 10BASE2 wiring system.
10BASE2 and .
When wiring a 10BASE2 network, special care has to be taken to ensure that cables are properly connected to all T-connectors, and appropriate terminators are installed.
10BASE2 systems do have a number of advantages over 10BASE-T.
Additionally, Apple 10BASE2 cables would terminate the network if no device was attached to them.
Additionally, AAUI held no advantage for any system other than 10BASE2 and thus as 10BASE-T became ubiquitous it became impossible to justify the cost of an external transceiver at all.
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