OSI Model — Set 6
Computers · OSI मॉडल · Questions 51–60 of 70
How many layers are there in the standard OSI model?
Correct Answer: C. 7
The OSI model consists of seven distinct layers, each with its own specific set of responsibilities. These are: Physical, Data Link, Network, Transport, Session, Presentation, and Application. This structured approach helps in standardized network design and troubleshooting.
Which is the lowest layer of the OSI model?
Correct Answer: B. Physical Layer
The Physical Layer is the first and lowest layer of the OSI model. It deals with the actual hardware and the raw transmission of bits over cables or wireless signals. It defines the electrical and mechanical aspects of the connection.
The 'IP address' is used at which layer of the OSI model?
Correct Answer: B. Network Layer
IP (Internet Protocol) addresses are used at the Network Layer (Layer 3) to route data packets. They provide a logical address that allows data to travel across different networks. Routers use these addresses to decide the best path for the data.
Which layer of the OSI model is responsible for 'Error Detection' at the frame level?
Correct Answer: B. Data Link Layer
The Data Link Layer (Layer 2) handles error detection for the data frames it transmits. It uses techniques like CRC (Cyclic Redundancy Check) to ensure data hasn't been corrupted. Hardware like switches operate at this layer.
What is the primary function of the Application Layer?
Correct Answer: A. Serving as the user interface
The Application Layer (Layer 7) provides the interface between the user and the network. it supports applications like web browsers (HTTP) and email clients (SMTP). It is the layer that interacts directly with the software you use.
Which layer is known for providing reliable 'End-to-End' message delivery?
Correct Answer: B. Transport Layer
The Transport Layer (Layer 4) ensures that messages are delivered reliably and in the correct order. It handles error recovery and flow control to prevent data loss. TCP is a well-known protocol that works at this layer.
Which layer handles data encryption and compression?
Correct Answer: B. Presentation Layer
The Presentation Layer (Layer 6) is responsible for formatting, encrypting, and compressing data. it ensures that the information is in a form that the receiving application can understand. It acts as the 'translator' for the network.
At which layer of the OSI model does a 'Router' primarily operate?
Correct Answer: B. Layer 3
Routers function at the Network Layer (Layer 3) to forward data between different networks. They use routing tables to determine the most efficient path for data packets. This layer is essential for connecting distant devices over the internet.
Which layer manages and synchronizes the dialogue between two computers?
Correct Answer: A. Session Layer
The Session Layer (Layer 5) establishes, manages, and terminates connections between applications. It handles the synchronization of data to ensure that long transfers can recover from interruptions. It coordinates the conversation between the two systems.
The 'MAC address' is associated with which layer of the OSI model?
Correct Answer: B. Data Link Layer
MAC (Media Access Control) addresses are used at the Data Link Layer (Layer 2). Every network card has a unique MAC address that identifies it on a local network. This address is used for physical communication between devices on the same segment.