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

Which layer is the layer closest to the transmission medium?

  1. Physical Layer

  2. Data Link Layer

  3. Network Layer

  4. Transport Layer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This layer is responsible for movement of individual of bits from one node to the next.Physical layer deals with the mechanical and electrical specifications of the interface and transmission medium.The following are the functions of the 

physical layer:Representation of bits,line configuration,physical topology,physical characteristics of interfaces and medium.this is closest to the transmission medium,so this is the correct answer.

Multiple choice

Which form information transforms before execution of transmittion?

  1. Periodic Signals

  2. Electromagnetic signals

  3. Non-periodic signals

  4. Low-frequency sine waves
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

the physical layer moves data in the form of electromagnetic signals across a transmission medium.whether you are collecting numerical statistics from computer,causing a bell to ring at a distant control center,sending animated pictures from a work station, you are working with transmission of data across network connections. this is the correct answer.

Multiple choice

Which type of transmission is done between telecommunication?

  1. Half Duplex

  2. Simplex

  3. Full Duplex

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Full Duplex is communication in both directions, at a same time, like in the case of telecommunication, the user and the sender, comminicate with each other at a same time.

Multiple choice

Which of the following statements is true?

  1. File transfer is an example of the standard at presentation layer.

  2. For constant signal and noise strength, an increase in data transmission rate increases the error rate.

  3. Asynchronous transmission is far more efficient than synchronous transmission.

  4. The 10BASE5 cabling is popularly known as thin ethernet.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Increase in data transmission rate leads to a higher number of packets, being transmitted at the same time.

Multiple choice

The layer SUBNET comprises of

  1. layers 1 and 3

  2. layers 1 and 2

  3. All layers

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All of the above answers are incorrect because subnet usually comprises the Network layer. The Network Layer is known as the communication subnet layer, which controls operations of subnets by determining how packets are to be distributed /routed between the networks (subnets).

Multiple choice

_____________ is also called as fast bridge.

  1. Switch

  2. Gateway

  3. Repeater

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

Switch is also called as fast Bridge. The common forwarding approaches include Cut through, Collision free and Fully buffered.

Multiple choice

Which frame is sent first, when one device wants to send data to another device?

  1. An ACK

  2. A poll

  3. A SEL

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When one device wants to send data to another device, a SEL frame is sent first. Before sending data, the primary device creates and transmits a select (SEL) frame, which includes the address of the secondary device. Select function is used, when primary device wants to send something to secondary device.

Multiple choice

Which of the following uses the same path from source to destination for each packet of a message?

  1. Circuit switching

  2. Message switching

  3. Virtual approach to packet switching

  4. Datagram approach to packet switching
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A virtual circuit network is a cross between a circuit switched network and a datagram network.the resources can be allocated during the setup phase.in a virtual packet switching ,all the packets follow the same path established during the connection.so this is the answer.