OSI Model Abstraction Layers Quiz

20 Questions

According to the OSI model, how many abstraction layers are used to describe networked communication?

Seven

Which organization is responsible for the conceptual model known as the OSI model?

ISO

What is the highest-level representation of data in the OSI model?

Application layer

Which protocol suite was developed contemporarily to the OSI model?

Internet protocol suite

What was the Internet protocol suite, as defined in RFC 1122 and RFC 1123, primarily funded by?

U.S. Department of Defense

Which layer in the OSI model is responsible for transmitting bits across a communications medium?

Physical layer

What is the OSI model?

A seven-layer model focusing on the software layers of communication

When was the OSI model first defined?

1978

Which model did the Internet Protocol Suite use instead of the OSI model?

The TCP/IP model

What was a major advance promoted by the OSI model?

Consistent model of protocol layers and interoperability between network devices

Where are the OSI standards documents available from?

ISO and ITU-T

'The development of the OSI model was influenced by various networking systems, including the NPL network, ARPANET, CYCLADES, EIN, and the International Networking Working Group (IFIP WG6.1).' What can be inferred from this statement?

'The OSI model was influenced by various networking systems'

What is the responsibility of the physical layer in the OSI model?

Transmission and reception of unstructured raw data

According to the OSI model, at each level N, two entities at the communicating devices exchange what by means of a layer N protocol?

Protocol Data Units (PDUs)

Which ISO/IEC document defines the OSI model?

ISO/IEC 7498-1

What are the main components of a Protocol Data Unit (PDU) exchanged between entities at the communicating devices?

Service data unit (SDU) and protocol-related headers or footers

What do communication protocols enable according to the OSI model definitions?

Communication between entities at different layers

Which layer in the OSI model is responsible for packet routing and forwarding?

Network layer

What does the recommendation X.200 describe?

Layer architecture with seven layers labeled 1 to 7

Where does the process of data transmission begin in OSI-compatible devices?

At the uppermost layer (layer N)

Study Notes

The OSI reference model, developed by the International Organization for Standardization (ISO), is a widely-used framework for understanding and teaching networking concepts in the field of information technology.
The development of the OSI model began in the late 1970s in response to the need for standardizing networking methods.
The model was first defined in raw form in 1978 by French software engineer Hubert Zimmermann, and was published as a standard in 1980.
The OSI model is a seven-layer model that focuses on the software layers of communication.
The model allows for transparent communication between parties through peer-to-peer networking.
The OSI model failed to gain widespread use in the design of the Internet, which instead used the less prescriptive Internet Protocol Suite.
The OSI model was a major advance in the standardization of network concepts, promoting the idea of a consistent model of protocol layers and interoperability between network devices and software.
The model was the result of an industry effort to provide multi-vendor interoperability, but was eventually overshadowed by the widespread use of TCP/IP in the late 1980s and early 1990s.
The OSI model had two major components: an abstract model of networking and a set of specific protocols.
The OSI standards documents are available from the ITU-T as the X.200 series of recommendations and from ISO.
The development of the OSI model was influenced by various networking systems, including the NPL network, ARPANET, CYCLADES, EIN, and the International Networking Working Group (IFIP WG6.1).

Test your knowledge of the OSI model abstraction layers with this quiz. Explore the concepts of Physical, Data Link, Network, Transport, Session, Presentation, and Application layers as defined in the Open Systems Interconnection model.

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