1.2.1 - Open Systems Interconnection Model (OSI)

Flashcards covering key concepts of the Open Systems Interconnection Model, its layers, and its purpose.

Open Systems Interconnection (OSI) Model

A framework developed by ISO to promote understanding of network components through seven discrete layers.

Seven layers of OSI model

1. Physical, 2. Data Link, 3. Network, 4. Transport, 5. Session, 6. Presentation, 7. Application.

Physical Layer

The lowest layer of the OSI model responsible for the physical connection between devices.

Data Link Layer

The layer responsible for node-to-node data transfer and detecting errors in the Physical layer.

Network Layer

The layer responsible for determining the best path for data transfer across a network.

Transport Layer

The layer that ensures complete data transfer and error recovery between the two hosts.

Session Layer

The layer that manages sessions between end-user applications.

Presentation Layer

The layer responsible for translating data formats, including encryption and compression.

Application Layer

The topmost layer that interacts directly with end-user applications.

Functional guideline

The purpose of the OSI model is to serve as a functional guideline for designing network protocols and troubleshooting.