Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
301
Which OSI layer is not present in broadcast networks?
Answer:
Network layer
In a simple broadcast network where all nodes are on the same segment, there is no need for routing, so the network layer is often absent.
302
Which organization created the OSI model to allow diverse systems to communicate?
Answer:
ISO
The Open Systems Interconnection (OSI) model was developed by the International Organization for Standardization (ISO).
303
The \_\_ layer allows users to access network services.
Answer:
Application
The Application Layer (Layer 7) is the OSI layer closest to the end user, which means it provides services directly to user applications.
304
How many OSI layers are included in the X.25 standard?
Answer:
Three
The X.25 protocol covers the first three layers of the OSI model.
305
which layer of OSI model used by router?
Answer:
layer 3
Routers are key devices that operate at the Network Layer (Layer 3) of the OSI model. Their main function is to forward data packets between different computer networks by using logical addresses, such as IP addresses, to determine the optimal path.
306
The \_\_ layer is responsible for delivering the complete message from process to process.
Answer:
Transport
The Transport Layer (Layer 4) provides transparent transfer of data between end users, providing reliable data transfer services.
307
Which device functions within the data link layer of a network?
Answer:
Bridge
A network bridge operates at the Data Link Layer (Layer 2) of the OSI model. It connects two or more network segments and uses the MAC (Media Access Control) addresses of devices to intelligently forward or filter traffic between them, reducing unnecessary traffic.
308
Which OSI layer is responsible for delivering a message from one process to another?
Answer:
Transport
The transport layer provides end-to-end communication services for applications, ensuring process-to-process delivery.
309
The \_\_ layer establishes, maintains, and synchronizes communication sessions.
Answer:
Session
The Session Layer (Layer 5) is responsible for opening, closing, and managing the session between end-user application processes.
310
The \_\_ layer transforms data into a mutually agreed format for communication.
Answer:
Presentation
The Presentation Layer (Layer 6) formats or translates data for the application layer based on the syntax the application accepts.