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

What is the world's largest network?

  1. The U.S. Military Network

  2. ARPANET

  3. The Internet

  4. The World Wide Web
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Internet is the global system of interconnected computer networks that use the Internet protocol suite to link devices worldwide.

Multiple choice geography economic activity people and resources utilisation of europe europe - peninsula of asia continents: europe

Example of one-way communication is ____________.

    1. computer networks

    2. telephone conversations

    3. book printing

    4. newspaper reading
    Reveal answer Fill a bubble to check yourself
    D Correct answer
    Explanation
    Defining One-Way Communication
    Picture an enormous crowded lecture hall. A professor steps up to a podium. The audience goes quiet. The professor begins to speak about, let's say, quantum string theory. He speaks for an hour and a half, and then he steps down and walks away without exchanging a word with anyone in the room. That's how one-way communication works.

    Communications theorists use simple models to describe how information flows between parties. The model uses three pieces: a sender, a receiver and a message. In one-way communication, a sender delivers a message to a receiver, but nothing flows back to the sender.

    Sometimes, one-way communication occurs because of the medium or method of communication. When you read a book, newspaper, or even this website, you play the part of the receiver in one-way communication. In these cases, the information moves in one direction because time and space separate the sender and the receiver. Print is a one-way communication medium.

    In the lecture hall, purpose separates the sender and receiver. The purpose of the lecture is to deliver, rather than exchange, information. To inform, to persuade, to entertain and to command are all common purposes for one-way communication, and we'll discuss each of these in this lesson.
    Multiple choice business organisation and correspondence postal services 4 - rapid communication and other facilities communication services postal services and warehouses communication and transport services importance, types and documentation in warehousing meaning of warehousing and warehousing warehousing

    The Information to be communicated in a data communications system is the ___________.

    1. medium

    2. protocol

    3. message

    4. transmission
    Reveal answer Fill a bubble to check yourself
    C Correct answer
    Explanation

    The Information to be communicated in a data communications system is the message. In data communication, message is transmitted from one point to another via network system which are designed to convey information from the point of origing to the destination.

    Multiple choice meaning and elements of computer system computer in accounting accountancy

    The device used to carry digital data on analogue lines is called as _____________.

    1. Modem

    2. Multiplexer

    3. Modulator

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

    A modem (modulator-demodulator) is the device that converts digital signals from a computer into analog signals for transmission over telephone lines and vice versa.

    Multiple choice meaning and elements of computer system computer in accounting accountancy

    The device used to carry digital data an analog lines is called as ___________.

    1. Modem

    2. Multiplexer

    3. Modulator

    4. Demodulator

    5. None
    Reveal answer Fill a bubble to check yourself
    C Correct answer
    Explanation

    The device used to carry digital data an analog lines is called as Modulator.

    An analog-to-digital converter, or ADC as it is more commonly called, is a device that converts analog signals into digital signals. ... One example is a modem which turns signals from digital to analog before transmitting those signals over communication lines such as telephone lines that carry only analog signals.

    A modulator is a device that performs modulation. A demodulator (sometimes detector or demod) is a device that performs demodulation, the inverse of modulation. A modem (from modulator–demodulator) can perform both operations.

    This process of imposing an input signal onto a carrier wave is called modulation. ... This is called amplitude modulation or AM. Frequency of an input signal can also be changed. If this input signal is added to the pure carrier wave, it will thereby change the frequency of the carrier wave.

    Multiple choice meaning and elements of computer system computer in accounting accountancy

    An example of digital communication is _____________.

    1. DDD

    2. DDS

    3. WATS

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

    An example of digital communication is DDT.

    DDT was the first modern pesticide and is arguably the most well known organic pesticide. Overall, it is known that DDT concentrates in biological systems (particularly in body fat), that it is a toxin, and that it bioaccumulates up the food chain, reaching its greatest concentrations in higher animals such as humans.

    DDT was a commonly-used pesticide for insect control in the United States until it was canceled in 1972 by the United States Environmental Protection Agency (EPA). DDT was initially used by the military in WW II to control malaria, typhus, body lice, and bubonic plague (1).

    DDT (dichlorodiphenyltrichloroethane) was outlawed in Britain in 1986 and banned as a pesticide worldwide under the Stockholm Convention in 2001 after it was discovered to be dangerous to wildlife and the environment.

    Multiple choice meaning and elements of computer system computer in accounting accountancy

    A device that can convert digital signals to analog signals is ____________.

    1. Packet

    2. Modem

    3. Block

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

    A device that can convert digital signals to analog signals is Modem

    An analog-to-digital converter, or ADC as it is more commonly called, is a device that converts analog signals into digital signals. Analog information is transmitted by modulating a continuous transmission signal by amplifying a signal's strength or varying its frequency to add or take away data.

    A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves. A modem converts between these two forms.

    In general terms a data converter is a device that converts analog signals to digital data or vice versa. Devices that convert analog signals to digital are frequently referred to as ADC. Devices that convert digital signals to analog are called DAC.

    Analog to Digital Converter samples the analog signal on each falling or rising edge of sample clock. In each cycle, the ADC gets of the analog signal, measures and converts it into a digital value. The ADC converts the output data into a series of digital values by approximates the signal with fixed precision.

    Multiple choice meaning and elements of computer system computer in accounting accountancy

    IEEE 802-3 ____________________.

    1. Analog based Deterministic

    2. Analog based non deterministic

    3. Digital based deterministic

    4. All of the above
    Reveal answer Fill a bubble to check yourself
    B Correct answer
    Explanation

    IEEE 802-3 is Analog based non deterministic.

    IEEE 802.3 is a working group and a collection of institute of electrical and electronic engineers (IEEE) standards produced by the working group defining the physical layer and data link layer’s media access control (MAC) of wired Ethernet. This is generally a local area network (LAN) technology with some wide area network (WAN) applications.


    Multiple choice elements of accounts overview of computerised accounting system accounting software concepts and types of computerized accounting system types of accounting software

    The manner in which a particular computer system is connected to others say through telephone lines is the element of ______. 

    1. connectivity

    2. data

    3. procedure

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

    Connectivity is being acknowledged as a sixth element of the computer system. The manner in which a particular computer system is connected to others say through telephone lines, microwave transmission, satellite link, etc. is the element of  connectivity.

    Multiple choice different modes of communication and their uses information technology communication systems physics

     Internet access by transmitting digital data over the wires of a local telephone network is provided by

    1. leased line

    2. digital subscriber line

    3. digital signal line

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

    DSL (Digital Subscriber Line) is a technology for bringing high- bandwidth information to homes and small businesses over ordinary copper telephone lines. xDSL refers to different variations of DSL, such as ADSL, HDSL, and RADSL.

    Multiple choice different modes of communication and their uses information technology communication systems physics

    Which of the below options are correct?

    1. High bandwidth is available for transmission of data in LAN networks

    2. High bandwidth is available for transmission of data in WAN networks

    3. Low bandwidth is available for transmission of data in LAN networks

    4. Bandwidth for both LAN and WAN networks is same
    Reveal answer Fill a bubble to check yourself
    A Correct answer
    Explanation

    High bandwidth is available for transmission in LANs as compared to WANs