What does 'over' mean in the following context?
Ethernet describes how network devices format and transmit data so other devices on the same LAN or campus network can recognize, receive and process the information. An Ethernet cable is the physical, encased wiring over which the data travels.
Source: https://www.techtarget.com/searchnetworking/definition/Ethernet
An alternate word would be through in this case.
encased wiring over which the data travels = encased wiring through which the data travels
This sentence is an inverted sentence.
encased wiring over which the data travels = the data travels over encased wiring
From Merriam-Webster:
preposition
4 c —used as a function word to indicate a particular medium or channel of communication
In this case, "the physical, encased wiring" is the medium or channel of communication.
