Glossary 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. Show only animated 0-9 A B C D E É F G H I J K L M N O P Q R S T U V W X Z QAM QoE QoS QPSK QSFP-DD QSFP112 Quadruply Clad Fiber (fibre à quadruple gaine) Quality of Experience (QoE) (qualité d'expérience) Quality of Service (QoS) (qualité de service)