Which physical connection is the fastest?

Fiber-optics is the fastest physical connection.

Fiber-optics is a medium of communication that involves the transmission of information from one location to another by sending light pulses along an optical fiber. The sent light pulses produce an electromagnetic carrier wave which is regulated to transmit information. Fiber optics can transmit information over longer distances and its performance is very high. This medium is used to transmit cable television signals, internet communication and telephone signals.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

when your a dog and you need a bone.   go and eat a rabbit