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.

Layer 6

In the seven-layer OSI model, it is the presentation layer. The presentation layer serves as the data translator for the network.  It is sometimes called the syntax layer. This layer is not used in modern communication networks.

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