Can you name and describe all seven levels of the OSI model?
sobes.tech AI
Answer from AI
The OSI (Open Systems Interconnection) model describes seven layers of network interaction:
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Physical Layer — transmission of bits over physical media (cables, radio channels). Defines electrical, mechanical, and procedural characteristics.
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Data Link Layer — organizing data transfer between neighboring nodes, error detection and correction at the physical layer, media access control.
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Network Layer — routing packets between different networks, logical addressing (e.g., IP).
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Transport Layer — ensures reliable data transfer, flow control, segmentation, and reassembly of messages (e.g., TCP, UDP).
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Session Layer — managing sessions, establishing, maintaining, and terminating connections between applications.
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Presentation Layer — data transformation into a format understandable by applications, encoding, encryption, compression.
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Application Layer — interaction with end-users and applications, providing network services (HTTP, FTP, SMTP, etc.).