Computer Knowledge

Computer Networks

2,256 Questions

Computer networks form the backbone of digital communication, connecting multiple devices to share data and resources. This area covers network architectures, transmission media, modems, and topologies like LAN. These concepts are crucial for computer knowledge sections in banking and government exams.

Network topologiesModulation and demodulationNetwork addressingFiber optic cablesWireless infrastructure

Computer Networks Questions

Multiple choice

Telnet helps in

  1. treansferring files across net

  2. connecting to television

  3. remote login

  4. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Telnet is a network protocol that enables remote terminal access, allowing users to log into and control distant computers over a network by providing a command-line interface.

Multiple choice

A network that spreads over cities is

  1. anyone of these

  2. MAN

  3. LAN

  4. WAN
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

WAN (Wide Area Network) covers large geographic areas including cities, countries, or continents, connecting multiple LANs and MANs over long distances.

Multiple choice

Which of the following is not a network?

  1. Local area network

  2. Optical fibre

  3. Wide area network

  4. All are networks
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Optical fiber is a transmission medium (a physical cable that carries data as light signals), not a network itself. Networks like LAN and WAN are systems of interconnected computers.

Multiple choice

Ethernet uses

  1. bus topology

  2. ring topology

  3. mesh topology

  4. star topology
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Traditional Ethernet (especially early versions like 10Base5 and 10Base2) uses bus topology where all devices share a common communication medium. Modern Ethernet using switches typically uses star topology, but the question asks about Ethernet's fundamental design. Ring topology is used by Token Ring, mesh in complex networks, and star requires a central hub.

Multiple choice

Which of the following is not true about workgroup [peer to peer] logical topology?

  1. A collection of computers connected together to share the resources is called workgroup.

  2. Any Operating system can be configured as workgroup model.

  3. Workgroup logical topology is suitable for smaller organisations.

  4. Servers are used in workgroup.

  5. No administrator is required in workgroup logical topology.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Server is a computer from which several clients are connected but in workgroup topology all computer are equals hence it is incorrect  statement.

Multiple choice

Which of the following is not true about domain logical topology?

  1. Domain is a collection of computers connected together with a server and users.

  2. It is suitable for smaller networks/organisations.

  3. Domain logical topology can have servers like UNIX, Novell NetWare, WIN-NT server, 2000 server and 2003 server.

  4. It provides centralised administration.

  5. Domain offers security and provides logon authentication.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Domain logical topology is a collection of computers connected together with a server and users which is based on client server model. A client server model can be implemented on large organization hence it is incorrect statement.

Multiple choice

When a message exchange is _____, both the sender and the receiver must come together to complete the transfer.

  1. synchronous

  2. asynchronous

  3. congruous

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In synchronous message passing, the sending process blocks until the receiving process is ready to accept the message. This rendezvous requires both processes to be actively involved at the same time. Asynchronous messaging allows the sender to continue without waiting.

Multiple choice

With _______ message exchange(s), the sender is not blocked when there is no outstanding RECEIVE.

  1. synchronous

  2. asynchronous

  3. both (1) and (2)

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Asynchronous message passing allows the sender to continue execution immediately after sending, without blocking for a corresponding receive operation. The system typically buffers messages until the receiver retrieves them. Synchronous messaging would block the sender.

Multiple choice

Channel, encoder, decoder, transmitter and receiver are main elements of network communication. Which of the following is the correct sequence of the given elements?

  1. Channel - Encoder - Decoder - Transmitter - Receiver

  2. Encoder - Transmitter - Channel - Decoder - Receiver

  3. Encoder - Channel - Transmitter - Decoder - Receiver

  4. Encoder - Transmitter - Channel - Receiver - Decoder

  5. Transmitter - Encoder - Channel - Decoder - Receiver
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is the correct sequence. In this process, a message is encoded by the encoder, which is transmitted by the transmitter. After that, through the channel it is sent to the decoder where decoder decodes that message and sends it to the the receiver.