noun
repeater; relay
Technical term in computing and telecommunications for a device that receives and retransmits signals to extend range or connect networks.
無線LANの中継器を設置して、電波の届く範囲を広げた。
I installed a wireless LAN repeater to extend the signal range.
このネットワークでは、中継器がデータを次のセグメントに転送する。
In this network, the relay forwards data to the next segment.
A hub broadcasts data to all ports; a 中継器 regenerates and retransmits signals, often used to extend physical range.
Compound of 中継 (relay, broadcast) and 器 (device, instrument). The exact historical derivation is uncertain, but the term follows standard technical word formation patterns.