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

A technician has been asked to troubleshoot an existing switched network but is unable to locate documentation for the VLAN configuration. Which of the following troubleshooting tools allows the technician to map and discover VLAN and port assignments?

  1. cable analyzer

  2. network analyzer

  3. protocol analyzer

  4. knowledge base
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The correct answer is B because a network analyzer (packet sniffer) can capture and analyze VLAN tagged traffic, allowing discovery of VLAN assignments and port mappings. Cable analyzers test physical connectivity, protocol analyzers focus on protocol decoding, and knowledge bases are documentation repositories - none discover live VLAN configurations.

Multiple choice

Refer to the exhibit. The switch and workstation are administratively configured for full-duplex operation. Which of the following statements accurately reflects the operation of this link?

  1. No collisions will occur on this link.

  2. Only one of the devices can transmit at a time.

  3. The switch will have priority for transmitting data.

  4. The devices will default back to half duplex if excessive collisions occur.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In full-duplex Ethernet operation, both devices can transmit and receive simultaneously without collisions because they use separate channels for transmit and receive. Half-duplex requires CSMA/CD and can only transmit in one direction at a time. Full-duplex does not default back to half-duplex due to collisions - collisions are impossible in true full-duplex mode. There is no transmission priority in full-duplex.

Multiple choice

What VLANs are allowed across a trunk when the range of allowed VLANs is set to the default value?

  1. Only the management VLAN

  2. All VLANs except the extended range VLANs

  3. All VLANs except 1 and 1002-1005

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

By default, Cisco switches allow all VLANs (1-4094) across a trunk port. The default trunk configuration does not restrict VLAN traffic unless explicitly configured with the switchport trunk allowed vlan command. This allows all VLANs, including the extended range VLANs, to traverse the trunk link.

Multiple choice

What is multiplexing in telecommunications and computer networks?

  1. It is a method by which multiple analog/digital signals/messages or digital data streams are selected according to the time slot, so that the signals or streams can be moved in a single medium. The signals/streams share a common path at different time intervals.

  2. It is a technique to transmit single signal using a physical channel.

  3. It is a technique to transmit one signal using multiple physical channels.

  4. It is a technique to transmit one signal without a medium.

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

In telecommunications and computer networks, multiplexing (sometimes abbreviated to muxing) is a method by which multiple analog message signals or digital data streams are combined into one signal over a shared medium. The aim is to share an expensive resource.

Multiple choice

Before transmission, data must be transformed into

  1. electromagnetic signal

  2. packets

  3. power of 2

  4. modulated data

  5. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transmission medium can carry only signals so any data must be converted into electromagnetic signal.

Multiple choice

The full form of MAN is

  1. mini area network

  2. metropolitan area network

  3. medium area network

  4. mega area network

  5. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

MAN stands for metropolitan area network.it covers a city for example a television network.

Multiple choice

What is the best possible definition of subnetting?

  1. Partitioning of a single physical network into more than one smaller logical sub-networks

  2. Combining two different networks to form a much more larger network

  3. Reducing the size of the given network without divisioning

  4. Forming a bridge between two different adhoc networks

  5. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Subnetting is the process of dividing the given network(the ip address range) into multiple logical networks.