Lesson 4 - Concept of Layers Flashcards
What is the primary purpose of layers in computer science?
To organize and separate different functionalities of a system.
True or False: Layers in computer science can lead to increased complexity.
True
Fill in the blank: The OSI model consists of ____ layers.
seven
What does OSI stand for?
Open Systems Interconnection
Which layer of the OSI model is responsible for data encryption?
Presentation layer
Multiple Choice: Which layer handles end-to-end communication in the OSI model? A) Application B) Transport C) Network D) Data Link
B) Transport
What is an example of a layer in software architecture?
Presentation layer, Business logic layer, Data access layer
True or False: The physical layer is the topmost layer of the OSI model.
False
Short Answer: Name one advantage of using layers in system design.
Modularity, easier troubleshooting, or improved maintainability.
Fill in the blank: In the TCP/IP model, the equivalent of the OSI’s Application layer is called the ____ layer.
Application
Multiple Choice: Which layer is primarily concerned with routing data packets? A) Application B) Network C) Transport D) Session
B) Network
What is the role of the Session layer in the OSI model?
To manage sessions between applications.
True or False: Layering can improve security by isolating different system functions.
True
What is the term for the process of breaking down a system into layers?
Layering
Fill in the blank: The Data Link layer is responsible for ____ and ____ of data frames.
framing and error detection
Multiple Choice: Which layer provides the means for the user to interact with the application? A) Presentation B) Application C) Session D) Transport
B) Application
Short Answer: What is one disadvantage of using layers in system design?
Potential performance overhead or complexity.
True or False: Each layer in a network model can only communicate with the layers directly above and below it.
True
What is the main function of the Transport layer?
To provide reliable or unreliable delivery of data.
Fill in the blank: The Network layer is responsible for ____ and ____ packets.
routing and forwarding
