Ethernet over Copper (EoC) is a type of Ethernet connection that uses twisted pair cables made of copper wire to connect devices on a local area network (LAN). This type of connection is typically used in business settings where there is a need for high-speed data transfer between devices.

There are several benefits to using ethernet over copper, including that it is less expensive than other types of Ethernet connections and can be easily installed in most buildings. Additionally, ethernet over copper offers higher speeds than traditional DSL or cable Internet connections.

One potential downside to using ethernet over copper is that the signal may be susceptible to interference from electrical equipment or other environmental factors. However, this can typically be mitigated by installing shielded cables or taking additional measures to reduce interference.