An Ethernet transceiver is an optoelectronic device used in Ethernet networks to convert electrical signals into optical signals and vice versa, enabling high-speed interconnection between switches, servers, and network interface cards(NIC). An optical module, also called fiber optic transceiver or optical transceiver, is a typically hot-pluggable device used in high-bandwidth data communications applications. They are used in fiber optic communication systems to transmit data over long distances with minimal loss and interference.