Function

Question 1

Transmission and reception of raw bit streams over a physical medium.

Answer 1

1. Physical

Question 2

Reliable transmission of data frames between two nodes connected by a physical layer.

Answer 2

2. Data link

Question 3

Structuring and managing a multi-node network, including addressing, routing, and traffic control.

Answer 3

3. Network

Question 4

Reliable transmission of data segments between points on a network, including segmentation, acknowledgement, and multiplexing

Answer 4

4. Transport

Question 5

Managing communication sessions, i.e. continuous exchange of information in the form of multiple back-and-forth transmissions between two nodes.

Answer 5

5. Session

Question 6

Translation of data between a networking service and an application; including character encoding, data compression and encryption/decryption.

Answer 6

6. Presentation

Question 7

High-level APIs, including resource sharing, remote file access.

Answer 7

7. Application