Telecommunications Glossary of terms used on this site

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Term Definition
OSI

Open Systems Interconnection or OSI model (OSI model) is a method of dividing a communications system into segments or layers, where each layer is a collection of related functions that offer services to the layer above it and receives services from the layer below. The OSI model consists of the following 7 layers; Physical Layer (Layer 1), Data Link Layer (Layer 2), Network Layer (Layer 3), Transport Layer (Layer 4), Session Layer (Layer 5), Presentation Layer (Layer 6) and Application Layer (Layer 7).

Aliases (separate with |): Open Systems Interconnection
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