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

If the computers connected to a network have equal status, it is called

  1. application-server network

  2. client-server network

  3. peer-to-peer network

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

Nearly all operating systems come with the ability to act as some kind of a server to share resources. You can set up different computers to allow others to use its peripherals, such as printers or CDROM drives and other computers to allow others to read or write to its hard disk, allowing sharing of files, while other computers may allow access to its internet connection. When you allow workstation computers to become servers and share things in this manner, it is called a peer-to-peer network. Peer-to-peer network has networks that have equal status. A typical home network might be done this way.

Multiple choice

Which of the following is not an important feature of local area network?

  1. An independent system is called node and is interconnected to LAN.

  2. There is generally one central node called ‘server’.

  3. The way the different types of services are handled by server depends upon topology and protocols.

  4. It can be used within limited wide area, say 10 Kms.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

LAN (Local Area Network) refers to a particular region that is interconnected by multiple computers into computer groups. “A region” refers to the same office, the same building, the same company and the same school, generally within a radius of several kilometres. You can provide different services like document management, application software sharing, printer sharing, scanner sharing, workgroup scheduling, e-mail and fax communications services and other VOIP and unified communication. Thus, option 4 is not true. 

Multiple choice

Which among the following are parts of local area network (LAN)?

(a) Workstation (b) Disk duplexing (c) File server (d) Modem

  1. (a), (b), (c) and (d)

  2. (b), (c) and (d)

  3. (a), (c) and (d)

  4. (a), (b) and (c)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Disk duplexing is a variation of disk mirroring in which each of multiple storage disks has its own SCSI controller. Disk mirroring (also known as RAID 1) is the practice of duplicating data in separate volumes on two hard disks to make storage more fault-tolerant. LAN can safeguard data by disk mirroring or disk duplexing.

Multiple choice

Consider the following statements:

  1. A passive optical network is a point-to-point optical network.
  2. A gigabit passive optical network has higher bandwidth and higher efficiency.

Which of the above statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither of them
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is incorrect because passive optical network is a point-to-multipoint network useful for broadcasting. Statement 2 is correct as gigabit passive optical network is the advanced form of passive optical network with more bandwidth than its predecessor and thus, is more efficient.

Multiple choice

If the transmission speed is 20 Mbps and the propagation speed in coax is 2/3 the speed of light in vacuum, then what will be the length of a bit on the original 802.3 standard?

  1. 20 meters

  2. 30 meters

  3. 50 meters

  4. It will not transmit the bit

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

It takes 0.1 µsec to transmit a bit at 10 Mbps rate. Thus, the bit lasts 0.1 µsec in time , during which it propagates 20 meters. Thus, a bit is 20 meters long here  as the speed of light in coax about is 200,000 km/sec (200 meters/µsec).

Multiple choice

Which of the following is /are true about GAN (Global Area Network)?

  1. It is an interconnected network of multiple WANs (Wide Area Network).

  2. It has routers and sublets for sending data packets in the medium.

  3. It has limited scope.

  4. All of the above.

  5. Only (1) and (2).
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Both are the true statements in case of Global Area Network (GAN).