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

Which of these devices is used for forwarding data packets between computer networks?

  1. Hub

  2. Token Ring

  3. Network Controller

  4. Bridge

  5. Router
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

A router is a device that forwards data packets between computer networks, creating an overlay internetwork. A router is connected to two or more data lines from different networks. When a data packet comes in one of the lines, the router reads the address information in the packet to determine its ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey. Routers perform the traffic directing functions on the Internet. A data packet is typically forwarded from one router to another through the networks that constitute the internetwork until it reaches its destination node.

Multiple choice

An Access Network is that part of a communication network which -1. Routes telephone calls

  1. Connects subscribers to their immediate service provider
  2. Exchanges information between different sub-networks.

Which of the above are true?

  1. Only 1

  2. Both 1 and 2

  3. Only 2

  4. Both 2 and 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An access network is that part of a telecommunications network which connects subscribers to their immediate service provider. It is contrasted with the core network, (for example the Network Switching Subsystem in GSM) which connects local providers to each other. Point 'a' and 'c' are functions of a core network.

Multiple choice

Consider the following statements about unified communication:

  1. It is the integration of real time communication systems with non-real time communication systems.
  2. It allows an individual to send and receive messages on the same medium.

Which of the above statements is/are true?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

UC allows an individual to send a message on one medium and receive the same communication on another medium.

Multiple choice

DSL is a family of technologies that is used to provide

  1. cable services

  2. radio transmission

  3. internet services

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

Digital subscriber line is a family of technologies that provide internet access by transmitting digital data over the wires of a local telephone network.

Multiple choice

To access data/address bus, tristate buffers are used ________________

  1. to isolate the devices

  2. to share devices simultaneously

  3. to provide pipelining to the bus

  4. none of these

  5. all of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tristate buffers have three outputs; i) 1  ii) 0  iii) open circuit (high resistance). When device is not in use, it goes in tristate condition, i.e. open circuit. This condition isolates the device from the bus. 

Multiple choice

What is Wi-Fi Technology?

  1. LAN connection

  2. Guided media LAN connection

  3. Wireless LAN connection

  4. MAN connection

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

Wireless networking is called Wi-Fi.

Multiple choice

Which of the following statements describe(s) a mesh network?

  1. Each device has a dedicated point-to-point link with the neighbour.

  2. Each device is connected to a hub.

  3. Hub is the central controller.

  4. Both 2 and 3

  5. Each device is connected to every other device on the network.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is a mesh network.

Multiple choice

What is a bus topology?

  1. It has a dedicated link.

  2. It has a ring-like structure.

  3. All devices can communicate at the same time in bus topology.

  4. It has a common bus with a cable as backbone and all devices are connected to this central cable.

  5. It has a hub.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the main idea behind bus topology.

Multiple choice

Which of the following describe(s) a LAN?

  1. Its size is not limited by distance.

  2. It can be used to connect nodes in a city or town.

  3. It is used to connect nodes across continents.

  4. LAN is a network used to connect devices within an office building, home or any similar-size network.

  5. Options 1 and 4 are correct.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is because a LAN is limited by its size.

Multiple choice

What is simplex mode of transmission?

  1. Two or more devices can send and receive data.

  2. It is a protocol.

  3. It is a topology.

  4. It is a network model.

  5. It is a mode in which communication is unidirectional as a one-way street.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Only one of the two devices can transmit and the other one can receive.

Multiple choice

GPS is a subset of ________ technology.

  1. GIS

  2. CAD

  3. TCP/IP

  4. bridge

  5. router
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GPS is a subset of GIS technology. GPS (Global Positioning System) is a satellite navigation system used to determine ground position and velocity (location, speed, and direction). Though it was created and originally used by the U.S. military, GPS is now available to the general public all over the world. GPS navigation systems are currently installed in a number of luxury cars, complete with an LCD map that shows the driver exactly where in the world he is. Advanced car GPS units can actually speak the directions to a certain destination and tell the driver when to turn. GIS (Geographic Information Systems) tools are used to gather and analyze data about the surface of the earth. The data can be used to create charts, maps, and 3D models of the earth's surface. This includes hills, mountains, trees, buildings, streets, rivers, and pretty much anything else. Sounds fun, but how is it used? Well, organizations such as the police and fire department can use the data to develop emergency routes. The government can use the data to measure the growth and expansion of cities or the depletion of forests. Most importantly, however, GIS can assist with special effects by simulating landscapes and terrain in action movies.