OSI Model — Set 1
Computers · OSI मॉडल · Questions 1–10 of 70
Which layer of the OSI model is responsible for routing data packets between different networks?
Correct Answer: A. Network Layer
The Network Layer handles the determination of the best physical path for data to reach its destination. It uses logical addressing such as IP addresses to manage packet forwarding. Routers are the primary hardware devices operating at this specific level.
Which layer is known as Layer 2 in the Open Systems Interconnection (OSI) model?
Correct Answer: C. Data Link Layer
The Data Link Layer provides reliable node-to-node delivery of data. It is divided into two sublayers: Logical Link Control and Media Access Control. Switches and bridges typically function at this stage of the network model.
What is the primary function of the Presentation Layer in the OSI model?
Correct Answer: C. Data encryption and compression
The Presentation Layer ensures that information sent by the application layer of one system is readable by the application layer of another. It handles tasks like character encoding, data compression, and security encryption. It acts as the translator for the network communication process.
Which layer of the OSI model manages end-to-end communication and error recovery?
Correct Answer: D. Transport Layer
The Transport Layer is responsible for the reliable delivery of messages between host systems. It handles segmenting data, flow control, and error checking to ensure completeness. TCP and UDP are the most common protocols found at this layer.
The Physical Layer of the OSI model deals with which of the following?
Correct Answer: C. Electrical and mechanical specifications
The correct answer is 'Electrical and mechanical specifications'. The Physical Layer is the lowest layer and focuses on the actual hardware used for data transmission. It defines cable types, signal voltages, and bit-level synchronization. Repeaters, hubs, and network cables are essential components of this layer.
Which layer is responsible for establishing, maintaining, and terminating communication sessions between applications?
Correct Answer: A. Session Layer
The Session Layer allows users on different machines to establish active communication sessions between them. It provides checkpoints and synchronization to manage dialogue control. It ensures that data from different streams is properly organized and synced.
Which layer provides services directly to the end-user or the software application?
Correct Answer: C. Application Layer
The Application Layer is the top layer and serves as the interface between the user and the network. It includes protocols like HTTP for web browsing, FTP for file transfer, and SMTP for email. It identifies communication partners and resource availability for the user's task.
At which layer of the OSI model does a 'Switch' primarily operate?
Correct Answer: D. Layer 2
A network switch operates at the Data Link Layer (Layer 2) to connect devices within a single network. it uses MAC addresses to forward data frames to the correct destination port. This increases network efficiency by reducing data collisions compared to a hub.
Which layer of the OSI model is responsible for framing data into manageable units?
Correct Answer: A. Data Link Layer
The Data Link Layer encapsulates packets from the network layer into frames. These frames include a header and a trailer containing control information for local delivery. This process ensures that bits are grouped correctly for transmission across the physical media.
The concept of 'Logical Addressing' is associated with which layer of the OSI model?
Correct Answer: C. Network Layer
The Network Layer uses logical addresses, such as IP addresses, which are independent of the hardware. This allows data to be routed across multiple interconnected networks globally. Logical addressing contrasts with the physical MAC addressing used at the Data Link Layer.