Lesson 4- Concepts of layers Flashcards
What is the primary purpose of layers in computer science?
To organize and abstract the complexity of systems.
True or False: The OSI model has seven layers.
True
Fill in the blank: The layer that provides end-to-end communication services for applications is the ______ layer.
Transport
Which layer of the OSI model is responsible for data formatting and encryption?
Presentation layer
Multiple Choice: Which of the following is NOT a layer in the OSI model? A) Application B) Network C) Hardware D) Data Link
C) Hardware
What layer of the OSI model deals with routing data packets?
Network layer
True or False: The Physical layer is responsible for the actual transmission of raw bits over a physical medium.
True
What is the role of the Application layer in the OSI model?
To provide network services directly to user applications.
Fill in the blank: The ______ layer is responsible for establishing, managing, and terminating connections.
Session
Multiple Choice: Which layer is responsible for error detection and correction? A) Transport B) Network C) Data Link D) Application
C) Data Link
What is the main function of the Data Link layer?
To provide node-to-node data transfer and error detection.
True or False: The Transport layer ensures that data is sent and received accurately.
True
What does the term ‘encapsulation’ refer to in layered architecture?
The process of wrapping data with protocol information at each layer.
Fill in the blank: The ______ layer provides the means for data transfer between devices on the same local area network.
Data Link
Multiple Choice: Which layer is closest to the end user? A) Presentation B) Application C) Session D) Transport
B) Application
What is the significance of the Transport layer’s segmentation?
It breaks down large data into smaller packets for efficient transmission.
True or False: The Network layer is responsible for physical addressing.
False
What does the term ‘protocol’ mean in the context of layered architecture?
A set of rules governing the format and transmission of data.
Fill in the blank: The ______ layer is responsible for the actual network access and physical addressing.
Physical
Multiple Choice: Which OSI layer is responsible for translating application data into a format suitable for the transport layer? A) Session B) Application C) Presentation D) Data Link
C) Presentation
What is a key difference between the OSI model and the TCP/IP model?
The OSI model has seven layers, while the TCP/IP model has four layers.
True or False: The Session layer is responsible for establishing and maintaining connections between applications.
True
What is the main role of the Physical layer in networking?
To transmit raw bitstreams over a physical medium.
Fill in the blank: The ______ layer is primarily concerned with data integrity and flow control.
Transport
Multiple Choice: Which layer of the OSI model is responsible for logical addressing? A) Network B) Data Link C) Transport D) Application
A) Network
What does it mean when a layer is said to be ‘peer-to-peer’?
Layers at the same level in different systems communicate directly with each other.
