Network Fundamentals / Ch. 2 - The TCP/IP and OSI Networking Models
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Application Layer | Interfaces between network and application software. Also includes authentication services.
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Presentation Layer | Defines the format and organization of data. Includes encryption.
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Session Layer | Establishes and maintains end-to-end bidirectional flows between endpoints. Includes managing transaction flows.
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Transport Layer | Provides a variety of services between two host computers, including connection establishment and termination, flow control, error recovery, and segmentation of large data blocks into smaller parts for transmission.
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Network Layer | Logical addressing, routing, and path determination.
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Data Link Layer | Formats data into frames appropriate for transmission onto some physical medium. Defines rules for when the medium can be used. Defines means by which to recognize transmission errors.
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Physical Layer | Defines the electrical, optical, cabling, connectors, and procedural details required for transmitting bits, represented as some form of energy passing over a physical medium.
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