10Base5 (10Base-5 or 10Base Thick)
From Network Dictionary Wiki
10Base5, also called ThickNet, is a 10-Mbps baseband Ethernet specification using a standard (thick) 50-ohm baseband coaxial cable. 10Base5, which is part of the IEEE 802.3 baseband physical layer specification, has a distance limit of 500 meters per segment. 10Base5 is based on Manchester signal encoding transmitted.
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