Computer Knowledge

Computer Networks

2,095 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 record management and office equipment business office - meaning, importance, functions and departments office management business organisation business studies office circulars concept of office management

_______ is the most instantaneous means of communication among the following.

  1. Courier

  2. Fax

  3. Email

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

Email allows for near-instantaneous transmission of messages globally, making it faster than physical mail, couriers, or traditional faxing.

Multiple choice elements of business classification of busniess activities business as an activity meaning and types of trade trade and aids to trade

A network that allows trade is called a ______.

  1. networking

  2. specialization

  3. internet

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

A market is one of the many varieties of systems, institutions, procedures, social relations and infrastructures whereby parties engage in exchange. While parties may exchange goods and services by barter, most markets rely on sellers offering their goods or services in exchange for money from buyers.

Multiple choice physics option c: imaging fibre optics basics optical fibre the critical angle, total internal reflection and optical fibre

What is the maximum range up to which fiber optic can be used without repeater in communication systems?

  1. 4 km

  2. 10 km

  3. 100 km

  4. 500 km
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The maximum distance of optical link first depends on the quality of the fiber used as a medium of transmission and the insertion losses of sub-systems utilized along the link. These factors mainly limit the span the the optical repeaters required for a designed link.

limit is generally 80-100 Km and when used with amplifiers 500 km

Multiple choice physics option c: imaging fibre optics basics optical fibre the critical angle, total internal reflection and optical fibre

(A): Optical fibres are widely used to communication network.
(R) : Optical fibres are small in size, light weight, flexible and there is no scope for interference in them.

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)

  2. Both (A) and (R) are true but (R) is not the correct explanation of (A)

  3. (A) is true but (R) is false

  4. (A) is false but (R) is true
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Optical fibres are widely used to communication network because they are small in size, light weight, flexible and there is no scope for interference in them. They are easy to handle due to it's small size, light weight and flexibility. They can be placed wherever we need. Further in this case, due to the no scope for interference , information cannot be loss or damage.

Multiple choice business organisation and correspondence transport: economic and social importance and kinds of transport modes and choice of transportation meaning and definition of transport transport services

They represent the conveyances. What are they?

  1. Infrastructure

  2. Networks

  3. Modes

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

They represent the conveyances, They represents 'modes'. Conveyance or modes can be defined as a process of transporting or carrying someone or something from one place to another in order to facilitate basic operations of an economy.

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

Without which of the following a generalized block diagram of communication system is incomplete?

  1. Channel

  2. Receiver

  3. Transmitter

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

Transmitter - which converts the signal in an electrical signal and then sends it.

Channel - which carries the signal.
Receiver - which receives and converts the signal in original form.

These three are essential  for a communication system.

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

What are the three essential part of a communication system?

  1. transmitter, channel and receiver

  2. transmitter, information source and receiver

  3. information source ,transmitter and channel

  4. transmitter , noise and channel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transmitter- which converts the signal in an electrical signal and then send it. Channel - which carries the signal.

Receiver - which receives and converts the signal in original form.
These three are essential  for a communication system.

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

A complete communication system must include:

  1. a transmitter and receiver

  2. a transmitter, a receiver, and a channel

  3. a transmitter, a receiver, and a spectrum analyzer

  4. a multiplexer, a demultiplexer, and a channel
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A communication system requires a transmitter to upload the signal, a receiver to receive the signal and a channel to carry this information

Multiple choice wireless connections parts of computer physics

In a ..................., a mobile station always communicates with just one base station. 

  1. Messaging hand off

  2. Hard hand off

  3. Soft hand off

  4. Roaming hand off
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a Hard hand off a mobile station always communicates with just one base station.

A hard handoff is a handoff technique used with cellular networks that requires the user's connection to be entirely broken with an existing base station before being switched to another base station. ... A hard handoff is also known as a hard handover or break-before-make handover.

 The handover or handoff process is of major importance within any cellular telecommunications network. It is necessary to ensure it can be performed reliably and without disruption to any calls.

SOft Handover:- When mobile ( in Call0 switches to a new sector/cell which is on the same frequency then it is called a soft handover. If the "new" sector is also from the same BTS then it is called a softer handover. UMTS networks omplements all types (Hard/Soft/Softer) of handovers.

Different approaches are proposed and applied in order to achieve better handoff service. The principal parameters used to evaluate handoff techniques are: forced termination probability and call blocking probability. ... Handoff (or handover) process is transferring an active call from one cell to another.

Multiple choice wireless connections parts of computer physics

A wireless network is also known as a/an ________.

  1. Wi-Fi network

  2. Internet

  3. Intranet

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

A wireless network, specifically one using the IEEE 802.11 standards, is commonly referred to as a Wi-Fi network.

Multiple choice wireless connections parts of computer physics

Voice mail ____________________________________________.

  1. is the exchange of text messages and computer files transmitted via a communications network such as a local are network or the Internet

  2. permits users to convere in real time with each other via the computer while connected to the Internet

  3. functions much like an answering machine, allowing callers to leave a voice message for the called party

  4. involves using video and computer technology to conduct a meeting between participants at geographically separate locations

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

Voice mail is a centralized system for storing voice messages from telephone callers, functioning similarly to an answering machine.

Multiple choice wireless connections parts of computer physics

Wireless adapters are ____________.

  1. Found in all laptops made after 1998

  2. Always needed to connects to wireless networks

  3. Either (a) or (b)

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

Wireless adaptors are Always needed to connects to wireless networks.

A wireless adapter is a hardware device that is generally attached to a computer or other workstation device to allow it to connect to a wireless system. Before the advent of consumer devices with built-in Wi-Fi connectivity, devices required the use of wireless adapters to connect to a network.

A USB Wi-Fi adapter eliminates the need to hardwire the computer to a router or other network device. ... The adapter receives signals from a wireless router or other wireless device and translates the signal so the computer user can access the Internet any time they are in range of a Wi-Fi hotspot or wireless network.

A high-speed wireless network card that is used to access a network through a USB port on a computer or laptop. Most wireless USB LAN adapters look like small USB flash drives and usually are based on the 802.11g standard which provides a data rate up to 54-Mbps in a wireless LAN environment.

While wireless LANs refer to any local area network (LAN) that a mobile user can connect to through a wireless (radio) connection; Wi-Fi (short for "wireless fidelity") is a term for certain types of WLANs that use specifications in the 802.11 wireless protocol family. ... Differences between Wi-Fi, WLAN and WiMax.