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Technology evolves at a rapid-fire pace. That’s why we’ve built an easy-to-use glossary to help you better understand the terms, technologies and trends that impact your business.


A device that receives, amplifies (and sometimes reshapes) and retransmits a signal. It is used to boost signal levels and extend the distance a signal can be transmitted. It can connect two or more LAN segments and physically extend the distance of a LAN. It immediately copies all bits arriving on each segment to all other segments, whether or not they are part of a valid frame.