Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
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
1
SMTP, FTP, and DNS protocols operate at which layer of the OSI model?
Answer:
application
SMTP (Simple Mail Transfer Protocol), FTP (File Transfer Protocol), and DNS (Domain Name System) are high-level protocols that provide services directly to end-user software applications, placing them firmly within the Application layer of the OSI model.
2
Which layer of the OSI model is commonly referred to as the end-to-end layer?
Answer:
Transport
The Transport layer is known as the end-to-end layer because it is responsible for the reliable transfer of data between the source and destination hosts.
3
What is the term for a single unit of data transmitted at the data link layer?
Answer:
Frame
In the OSI model, the data link layer is responsible for node-to-node data transfer. The protocol data unit (PDU) at this layer is called a frame.
4
In the context of the Data Link Layer, what is the specific term used to describe a single unit of encapsulated data?
Answer:
Frame
In networking, the Data Link Layer is responsible for node-to-node data transfer. The protocol data unit (PDU) at this layer is referred to as a frame.
5
Which layer of the OSI model is primarily utilized by routers for path determination and packet forwarding?
Answer:
layer 3
Routers operate at the Network Layer (Layer 3) of the OSI model. This layer is responsible for logical addressing and routing data packets across different networks by determining the most efficient path for data transmission.
6
How many layers are defined in the standard TCP/IP model?
Answer:
five
The TCP/IP model is often described as having five layers in modern networking contexts, which include the Physical, Data Link, Network, Transport, and Application layers.
7
What is the final stage of the data encapsulation process in networking?
Answer:
Frames are placed into bits
Data encapsulation is the process of wrapping data with protocol information at each layer of the OSI model. The final stage involves converting the data frames into a stream of bits, which are then transmitted across the physical medium.
8
At which layer of the OSI model does a network bridge primarily operate?
Answer:
Both (a) and (c)
A network bridge is a device that connects two or more network segments. It operates primarily at the Data Link layer (Layer 2) to filter traffic based on MAC addresses.
9
SMTP, FTP, and DNS are protocols that operate at which layer of the OSI model?
Answer:
Application
SMTP (Simple Mail Transfer Protocol), FTP (File Transfer Protocol), and DNS (Domain Name System) are all high-level protocols that provide services directly to end-user software.
10
How many distinct layers are defined within the OSI networking model?
Answer:
Seven
The Open Systems Interconnection (OSI) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven distinct layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.