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 the following is NOT done by modem?

  1. Transmission Speed

  2. Data Accuracy

  3. Error detection and Correction

  4. Data Compression
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Modems perform several key functions: converting digital signals to analog for transmission (modulation), converting analog signals back to digital (demodulation), controlling transmission speed, detecting and correcting errors, and compressing data. However, 'data accuracy' is not a direct function of modems - accuracy depends on the error detection and correction mechanisms, not the modem itself as a primary function.

Multiple choice

Under which case will intranet be an effective networking tool/s?

  1. In a distributed decision-making environment

  2. Where heterogeneous applications are involved

  3. In a centralised organization

  4. In a decentralisad organization
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An intranet is most effective in a centralized organization where there's consistent control over information flow, standardized processes, and uniform technology adoption. Centralized organizations can implement intranet systems more uniformly across departments, ensuring better compliance and information sharing. Distributed or decentralized environments often face challenges with standardization and may have fragmented information systems that reduce intranet effectiveness.

Multiple choice

What is NOT a feature of networking?

  1. Reliability

  2. Greater storage space

  3. Connectivity

  4. All are features of networking
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Since the question asks what is NOT a feature, choosing 'All are features' indicates none qualify as exceptions. Networking provides reliability and connectivity between devices, while primarily offering access to shared storage rather than directly increasing local capacity. The logic follows that if all options represent valid networking features, then no single feature stands as the exception.

Multiple choice

A modem performs _________

  1. modulation

  2. demodulation

  3. data compression

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Modems perform modulation (converting digital signals to analog for transmission), demodulation (converting received analog signals back to digital), and often include data compression to improve throughput efficiency. All three functions are core modem operations, making 'all of these' the comprehensive answer.

Multiple choice

In which of the following characteristics of the network, if the dimension of distance is hidden then users can not tell whether a remote host is in the room next door or in a different country?

  1. Automation

  2. Opaqueness

  3. Distance

  4. Efficient

  5. Reliable
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In this characteristic of the network, if the dimension of distance is hidden then users can not tell whether a remote host is in the room next door or in a different country.

Multiple choice

Which of the following statements is/are true about internet?

A. Internet is a group of connected communicating devices. B. Internet is composed of hundreds of thousands of interconnected networks. C. Internet is made of two or more networks that can communicate with each other. D. Internet is made up of many wide and local area networks joined by connecting devices and switching stations.

  1. A and B

  2. B and C

  3. Only B

  4. Only C

  5. Only D
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Option C is correct.

Multiple choice

Which of the following statements is/are incorrect about internet?

A. Internet is made of two or more networks that can communicate with each other. B. Internet is made up of many wide and local area networks joined by connecting devices and switching stations. C. Internet is a group of connected communicating devices. D. Internet is composed of hundreds of thousands of interconnected networks.

  1. A and B

  2. B and C

  3. Only A

  4. Only B

  5. Only D
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Option A is wrong.

Multiple choice

Which of the following statements is/are correct?

A. National ISPs at the top of the hierarchy are the ISPs that connect end users to one or more regional ISPs. B. Local ISPs that are connected to one or more regional ISPs are at the second level. C. Local ISPs that provide direct services to the end users can be connected to regional ISPs or directly to national ISPs. D. The top level ISPs that connect nations together are called international ISPs.

  1. A and B

  2. B and C

  3. C and D

  4. Only A

  5. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both are correct.

Multiple choice

Which of the following statements is/are true?

A. ARPANET and MILNET are both large area networks of connected computers. B. ARPANET and MILNET are both small networks of connected computers. C. ARPANET is a small network of connected computers, while MILNET is bigger than ARPANET. D. ARPANET is used for nonmilitary users, while MILNET is used for military users.

  1. Only A

  2. Only B

  3. Only C

  4. Only D

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

 Option D is correct.

Multiple choice

What is the role of topology in networking?

  1. The topology defines how devices are connected to make a network. The devices can be connected using a mesh topology.

  2. The devices can be connected using a net topology.

  3. The devices can be connected using a star topology.

  4. The devices can be connected using a ring topology.

  5. The devices can be connected using a bus topology.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Option 2 is wrong.

Multiple choice

Which of the following statements is incorrect?

  1. The transmission mode is defined by the transport layer between two devices.

  2. A transmission mode can be simplex, half - duplex or full-duplex.

  3. In a simplex mode, only one device can send and the other can receive.

  4. In a half - duplex mode, two devices can send and receive, but not at the same time.

  5. In a full - duplex mode, two devices can send and receive at the same time.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option 1 is wrong.