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 half-duplex mode?

  1. It is half part of a network.

  2. The sender can transmit only in one direction always.

  3. The stations can both transmit and receive but not at the same time.

  4. The sender can transmit in both directions at the same time.

  5. Both 1 and 3.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct definition of half-duplex mode.

Multiple choice

What are peering points?

  1. They are the points of connection between two devices.

  2. They are the networks connected by switching stations.

  3. ISP networks are connected to each other by private switching stations called peering points.

  4. ISP networks are connected to each other by public switching stations called peering points.

  5. Peering points provide connectivity between end users.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct explanation of peering points.

Multiple choice

What do you mean by framing?

  1. Data link layer divides the stream of bits in manageable data units.

  2. It is the rate at which data is transmitted.

  3. It is the conversion of bits into analog signal.

  4. It is the addition of a header to the data.

  5. It is the addition of a trailer to the data.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

These manageable units are called frames.

Multiple choice

What are the two versions of ALOHA?

  1. Soft and hard

  2. Pure and impure

  3. Pure and slotted

  4. Linear and nonlinear
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The two versions of ALOHA are:

  1. Pure ALOHA
  2. Slotted ALOHA
Multiple choice

Which of the following statements is false?

  1. Synchronous transmission is more efficient than asynchronous one.

  2. ISDN B channel has capacity of 64 kbps.

  3. FDDI can spread distance of up to 2000 kms.

  4. Ethernet employs manchester coding.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

FDDI can spread over 200 kms. For large networks, it requires more repeaters.

Multiple choice

What is the requirement of half duplex operations?

  1. Noiseless channels

  2. Modem at both ends

  3. High speed links

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

All the above answers are wrong, because half duplex operations involves data flow in only one direction at a time. It is a two wire transmission with medium cost and efficiency.

Multiple choice

Which of the following techniques is/are used by frame relay?

  1. Message switching

  2. Circuit switching

  3. Connection oriented packet switching

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

Frame relay uses connection oriented switching technique because synchronous frames of data are routed to different destinations depending on header information.

Multiple choice

Which of the following statements is true with respect to switches?

  1. Switches are limited to small networks.

  2. Switches are inefficient.

  3. Switches are not used presently.

  4. Switches are better than the hubs.

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Switches are better than the hubs. Switches amplify the bandwidth, so that the same throughput is provided, to each of the machines, connected to the switch. On the other hand, hub simply divides the throughput equally among various nodes, connected to it.

Multiple choice

How many segments can be implemented on the LAN Ethernet with 10 base 5?

  1. 5

  2. 4

  3. 3

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

The 10 base 5 permits five cable segments, multiple 10 base 5 segments may be connected through repeaters to form a larger network, that still consists of a single collision domain. A repeater regenerates the signals from receiving it from one cable segment, and transmitting to all cables.

Multiple choice

How can we measure traffic over a network?

  1. By relative congestion

  2. Repeater

  3. By routing algorithm

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

Traffic in a network is usually measured by relative congestion, it is amount of data that flows.

Multiple choice

Which of the following statements is/are correct with respect to FDM (Frequency Division Multiplexing)? A. It takes advantage of passband transmission to share a channel. B. It divides the spectrum into frequency bands.

  1. Only A

  2. Only B

  3. Both A and B

  4. Neither A nor B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both statements are true with respect to FDM. FDM takes advantage of passband transmission to share a channel and also divides the spectrum into frequency bands.