CCST Network Models - Chapter 6

Which layer of the OSI model is most often used to control end-to-end quality of service?

• Application

• Data Link

• Presentation

• Network

Which layer of the OSI model is related to protocols like TCP and UDP?

• 3

• 4

• 5

• 6

Which layer of the OSI model is related to physical addresses and switching protocols?

• 3

• 4

• 5

• 2

Which layers of the OSI model are generally grouped and handled by single protocols?

• Application/Presentation

• Network/Data link

• Presentation/Session

• Session/Transport

Why is understanding network models important?

• So you can place protocols in their proper context within a computer network

• So you can understand “Layer 2,” “Layer 3,” etc.

• So you can quote the layers of each model when asked

• So you can understand network management display

What is the correct order of the seven layers of the OSI model, from lowest to highest?

• Data link, physical, transport, network, presentation, session, application

• Session, application, presentation, physical, data link, network

• Physical, data link, network, transport, session, presentation, application

• Application, presentation, session, transport, network, data link, physical

What are two significant things about Layer 2—the data link layer—of the OSI model? (Choose two.)

• Data is carried in frames.

• Data is carried in packets.

• Routers operate at this layers.

• Switches operate at this layer

What are two significant things about Layer 3—the network layer—of the OSI model? (Choose two.)

• Data is carried in frames.

• Data is carried in packets.

• Routers operate at this layer.

• Switches operate at this layer

What kinds of addresses are used in Layer 3 of the OSI model?

• MAC addresses

• EUI-48 addresses

• Internet Protocol addresses

• Port numbers

Why is it sometimes difficult to map OSI model layers to protocols in the TCP/IP suite?

• Every function provided by protocols in the TCP/IP suite of protocols is not described in the OSI model

• Every function described in the OSI model is not provided in the TCP/IP suite of protocols

• Some functions described in the OSI model are either repeated by multiple protocols or fall into protocols outside the specified layer.

• Some functions in the TCP/IP suite of protocols do not exist in the OSI model