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 general knowledge science & technology

How long would it take to send the encyclopedia Britanica over a Fibre optic cable at a rate of 2 gigabits per second?

  1. Two seconds

  2. One second

  3. Three seconds

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

Assuming the Encyclopedia Britannica is roughly 1-2 GB, at 2 Gbps it would transfer in approximately 0.5-1 second. However, this question requires specific assumptions about encyclopedia size and transmission rates that aren't provided.

Multiple choice general knowledge science & technology

You live with your 4 other friends. All have laptops but only one internet connection. Service provider has noted the physical address(MAC address) of your subscribed laptop. How your friends can use internet on their laptops? (Select best option)

  1. By using proxy server.

  2. Using a hub.

  3. User can change their Physical address identical to subscribed laptop.

  4. Apply for another net connection.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When an ISP binds service to a specific MAC address, other devices can gain access by spoofing that MAC address. This involves changing the network interface's physical address to match the subscribed laptop's MAC. Proxy servers and hubs don't address the MAC authentication issue, and getting another connection is unnecessary. MAC spoofing is a technical workaround that allows multiple devices to share the authorized connection.

Multiple choice general knowledge science & technology

You live with your 4 other friends. All have laptops but only one internet connection. Service provider has noted the physical address(MAC address) of your subscribed laptop. How your friends can use internet on their laptops? (Select best option)

  1. By using proxy server.

  2. Using a hub.

  3. User can change their Physical address identical to subscribed laptop.

  4. Apply for another net connection.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

MAC addresses are hardware addresses assigned to network interfaces. ISPs can bind their service to a specific MAC address. Users can change their computer's MAC address to match the subscribed one (MAC spoofing), allowing multiple devices to share the connection. This works because ISP authentication checks only the MAC address, not the physical hardware itself. Proxy servers and hubs require additional hardware/configuration, and a new connection would cost extra money.

Multiple choice general knowledge science & technology

You live with your 4 other friends. All have laptops but only one internet connection. Service provider has noted the physical address(MAC address) of your subscribed laptop. How your friends can use internet on their laptops? (Select best option)

  1. By using proxy server.

  2. Using a hub.

  3. User can change their Physical address identical to subscribed laptop.

  4. Apply for another net connection.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

MAC addresses can be spoofed (changed in software) to match the subscribed laptop's address, allowing other devices to authenticate. This is a form of bypassing network authentication. While not ethical or recommended, it is technically feasible. A hub would share the connection but ISP authentication would still fail.

Multiple choice general knowledge science & technology

You live with your 4 other friends. All have laptops but only one internet connection. Service provider has noted the physical address(MAC address) of your subscribed laptop. How your friends can use internet on their laptops? (Select best option)

  1. By using proxy server.

  2. Using a hub.

  3. User can change their Physical address identical to subscribed laptop.

  4. Apply for another net connection.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

MAC (Media Access Control) addresses can be cloned or spoofed in software. By changing the MAC address on other laptops to match the ISP-registered MAC address, they can authenticate on the network. This is technically feasible though it violates ISP terms of service. A proxy server would work but requires the registered laptop to be always on. A hub doesn't solve authentication.

Multiple choice general knowledge

Which of the below is not a type of network?

  1. MAN

  2. HAN

  3. LPN

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

LPN is not a standard network type classification. The correct network types are LAN (Local Area Network), MAN (Metropolitan Area Network), WAN (Wide Area Network), and VPN (Virtual Private Network). HAN (Home Area Network) is also a valid term, but LPN has no standard meaning in networking.

Multiple choice general knowledge

The Network is the Computer

  1. Cisco

  2. Sun Microsystems

  3. IBM

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

Sun Microsystems used the slogan 'The Network is the Computer' in the late 1980s to emphasize their vision of network-centric computing. This was ahead of its time, predicting the importance of networking and cloud computing. Cisco focuses on networking infrastructure, IBM on enterprise computing, and Microsoft on personal computing software.

Multiple choice general knowledge science & technology

Data on LAN is generally broadcasted. Why your computer doesn't accepts data which is coming for another computer?

  1. NIC card is default set to promiscuous mode

  2. NIC card is default set to non promiscuous mode

  3. OS takes care of this security issue.

  4. Hub logic takes care of it.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In non-promiscuous mode, the NIC card only accepts frames where the destination MAC address matches its own hardware address or is a broadcast/multicast address. This hardware-level filtering happens before the data even reaches the operating system, ensuring each computer only processes the data specifically meant for it. Promiscuous mode would accept all frames regardless of destination.

Multiple choice general knowledge science & technology

A locked phone:

  1. can work with only one specific provider's service

  2. can work only in a limited range within a network

  3. has no SIM card

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

A locked phone is restricted by software to work only with the specific carrier that sold it, typically through a SIM lock or network lock. This prevents the phone from accepting SIM cards from other providers, ensuring the carrier recovers their subsidy on the device.

Multiple choice general knowledge science & technology

Wi-Fi is a -

  1. type of computer

  2. type of network cable

  3. set of popular technologies and standards for wireless computer networking

  4. set of computer programs that help people make money on the Internet
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To solve this question, the user needs to have a basic understanding of computer networking.

Option A is incorrect because Wi-Fi is not a type of computer. A computer is a machine that can store, retrieve, and process data.

Option B is incorrect because Wi-Fi is not a type of network cable. Network cables are physical cables that connect devices to a network.

Option C is correct. Wi-Fi is a set of popular technologies and standards for wireless computer networking. It allows devices to connect to a network without using physical cables.

Option D is incorrect because Wi-Fi is not a set of computer programs that help people make money on the Internet. Wi-Fi is a technology used for wireless networking.

Therefore, the answer is: C. set of popular technologies and standards for wireless computer networking.

Multiple choice general knowledge science & technology

Which of these are forms of Internet service?

  1. DSL

  2. cable, dialup, satellite

  3. ISDN

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

DSL (Digital Subscriber Line), cable internet, dial-up, satellite, and ISDN (Integrated Services Digital Network) are all legitimate technologies for connecting to the internet, each using different infrastructure and transmission methods. Therefore, 'all of the above' is the correct answer as all options represent valid forms of internet service.