10BaseF is 10MHz Ethernet running over fiber-optic cabling. 10BaseF depends on the signaling technology and medium used but can go up to 2 kilometers. 10BaseF networks are star-wired, so there is no minimum distance requirement between devices because devices cannot be connected serially. 10BaseT is 10MHz Ethernet running over unshielded, twisted-pair cabling. 10BaseT networks are star-wired, so there is no minimum distance requirement between devices as described in this document because devices cannot be connected serially.
Repeaters can make cable runs longer, but there are rules for repeaters.
For an Ethernet LAN, there can be no more than five repeated segments, nor more than four repeaters between any two Ethernet stations. Of the five cable segments, only three can be populated. If a type of cable is consistent throughout a network then theoretical distance limits equal five times the single segment length. If a network contains mixed cable, then distances are estimates and depend heavily on the bridging devices between segments. Its use as a cable distribution media throughout a building, in place of category 5 wire, is an unnecessary expense.