(Part 2) Network Model

What is the purpose of an interface in the OSI model?

• To remove headers from the data unit

• To define the service that a layer must provide

• To define the physical aspects of data transmission

• To encapsulate data before network transit

What does encapsulation refer to in the OSI model?

• Creating a conceptual view of data encapsulation

• Wrapping data with necessary protocol information

• Removing headers from the data unit at each layer

• Adding headers to the data unit at each layer

At which layer is the data encapsulated with a header before being passed to the layer below?

• Layer 5 (Session layer)

• Layer 1 (Physical layer)

• Layer 3 (Network layer)

• Layer 7 (Application layer)

What is the role of the Transport Layer (Layer 4) in the OSI model?

• Insuring that the transmitted data is in a form that the upper layers can use

• Dealing with the physical aspects of data transmission

• Allowing interoperability among unrelated software packages or systems

• Providing network services to application processes

Which layers are classified as the network support layers in the OSI model?

• Layer 1, 2, and 3 (Physical, Data Link, Network)

• Layer 4, 5, and 6 (Transport, Session, Presentation)

• Layer 5, 6, and 7 (Session, Presentation, Application)

• Layer 6, 7, and 1 (Presentation, Application, Physical)

What does the Application Layer (Layer 7) provide in the OSI model?

• Interoperability among unrelated software packages or systems

• Network services to application processes

• Insuring that the transmitted data is in a form that the upper layers can use

• Physical addressing and electrical connections

Which layer is closest to the user in the OSI model?

• Layer 7 (Application layer)

• Layer 1 (Physical layer)

• Layer 4 (Transport layer)

• Layer 5 (Session layer)

What is an example of an interface in the Application Layer (Layer 7) of the OSI model?

• Network services to application processes

• Adding headers to the data unit at each layer

• Physical addressing and electrical connections

• Message handling service (MHS)

What is the purpose of the Data Link Layer (Layer 2) in the OSI model?

• Providing physical addressing and electrical connections

• Allowing interoperability among unrelated software packages or systems

• Dealing with the physical aspects of data transmission

• Insuring that the transmitted data is in a form that the upper layers can use