OSI Model Layers and Purposes
CompTIA Network+ N10-009 (V9) PBQ
Identify the purpose and use-case of each OSI Model Layer.
Controls data framing, error detection, and medium access control.
Manages and controls communication sessions between computers.
Deals with the physical transmission of data over network media.
Provides services directly to end-users and applications, like email or file transfer.
Ensures reliable data transfer and error correction between hosts.
Translates data between the application and network formats, ensuring proper encoding and encryption.
Handles logical addressing, routing, and data packet forwarding.
Layer 3
Layer 2
Layer 7
Layer 1
Layer 4
Layer 6
Layer 5