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(Or "cheapernet") The variant of Ethernet that uses thin coaxial cable (RG-58 or similar), as opposed to 10base5 cable.

The "10" means 10 Mbps, "base" means "baseband" as opposed to radio frequency and "2" means a maximum single cable length of 200m.
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An earlier 10 Mbps Ethernet standard that used a thin coaxial cable. Network nodes were attached to the cable via T-type BNC connectors in the adapter cards. Also called "thin Ethernet," "ThinWire," "ThinNet" and "Cheapernet," 10Base2 had a distance limit of 607 feet. See 10Base5, 10Base-T, Ethernet and CSMA/CD.

10Base2 "Thin" Ethernet
10Base2 used a thin coaxial cable attached to each node using BNC T-connectors.
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References in periodicals archive ?
Most of the building management network is 10Base-2 (coax).
Coaxial cable, such as Ethernet 10Base-2 can also be tested.
Hubbell Premise Wiring's cross-connect system may be enhanced with convenient adapters for Category 5, S-video, ST (fiber), SF (coax), and BNC (10Base-2).
'We could see that 10Base-2 would never get beyond 10 Mbps in the near future,' Papesh says.
Provides direct connection to Ethernet LAN through 10Base-T or 10Base-2 wiring and supports PCL 5e emulation.
Connector options include 10Base-T, 10Base-5, 10Base-2 or fiber optic (FOIRL).