1.2.2 - The Seven Layers of the OSI Models

Question 1

Network process to Application • Provides network services to the applications of the user, such as e-mail, file transfer, and terminal emulation.

Answer 1

Application Layer

Question 2

End-to-end Connections • Handles transportation issues between hosts • Ensure data transport reliability • Establishes, maintains, and terminates circuits • Provides reliability through fault detection and recovery information flow control

Answer 2

Transport Layer

Question 3

• Routes data packets • Select best paths to deliver data • Provides logic addressing and path selection

Answer 3

Network Layer

Question 4

The physical layer defines the electrical, mechanical, procedural, and functional specifications for activating, maintaining, and deactivating the physical link between end systems.

Answer 4

Physical Layer

Question 5

Data Representation • Ensures that the information sent at the application layer is readable by the receiving system.

Answer 5

Presentation Layer

Question 6

Interhost Communication • Establishes, manages, and terminates sessions between applications

Answer 6

Session Layer

Question 7

• Defines how data is formatted for transmission and how access to the physical media is controlled. • Provides error detection

Answer 7

Data Link Layer