COVID-19: As a designated essential telecom solutions provider, EXFO remains fully operational with our employees' health and safety as our top priority.

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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.


The sequence of bits that form the unit of data transmission at the LAN data-link layer or medium access-control layer. In Ethernet, a frame consists of the sequence of bits transmitted by a station from the preamble through the frame check sequence. Also known as a packet.

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