Sarkari JobsTest Prep
Download App

Computer Networks MCQs 2026

45 questions with detailed answers · 17 from past papers · 5 quiz batches available

📚 Computer📄 17 Past-Paper Qs✓ Free · No Login Needed
🎯 Mock Test

Read each question, think about the answer, then click Show Answer to reveal the correct option and explanation. Load 10 at a time so it stays manageable — perfect for one-topic study sessions on the bus or during a break.

Page 1 of 1Questions 1–10 of 45
  1. Q1medium

    The failure of the central device brings down the whole network in which topology

    1. ABus
    2. BRing
    3. CStar
    4. DMesh
    💡 Explanation:

    In a star topology, failure of the central hub disables the whole network.

  2. Q2hard

    A bridge is used to

    1. ARoute between the internet and a LAN
    2. BConnect and filter traffic between two LAN segments
    3. CAmplify signals
    4. DAssign IP addresses
    💡 Explanation:

    A bridge connects and filters traffic between two LAN segments.

  3. Q3Past Paper · PPSC/FPSC/NTSeasy

    The largest wide area network in the world is the

    1. AIntranet
    2. BExtranet
    3. CEthernet
    4. DInternet
    💡 Explanation:

    The Internet is the largest WAN, connecting networks worldwide.

  4. Q4medium

    In full-duplex transmission, data flows

    1. AIn one direction
    2. BIn no direction
    3. CIn both directions simultaneously
    4. DOnly when idle
    💡 Explanation:

    Full-duplex allows data to flow in both directions at the same time.

  5. Q5medium

    A walkie-talkie is an example of which transmission mode

    1. ASimplex
    2. BFull-duplex
    3. CBroadcast
    4. DHalf-duplex
    💡 Explanation:

    A walkie-talkie is half-duplex: both can talk but only one at a time.

  6. Q6easy

    Which wireless technology is used for short-range connections between devices

    1. AWi-Fi
    2. BBluetooth
    3. CEthernet
    4. DFiber
    💡 Explanation:

    Bluetooth is used for short-range wireless connections between devices.

  7. Q7easy

    Wi-Fi is used to create a wireless

    1. ALAN
    2. BWAN only
    3. CMAN only
    4. DPAN only
    💡 Explanation:

    Wi-Fi creates a wireless local area network (WLAN).

  8. Q8Past Paper · PPSC/FPSC/NTSeasy

    A set of rules that governs data communication is called a

    1. ATopology
    2. BGateway
    3. CProtocol
    4. DBandwidth
    💡 Explanation:

    A protocol is a set of rules that governs how data is communicated.

  9. Q9medium

    TCP/IP is a

    1. ASingle protocol
    2. BCable type
    3. CTopology
    4. DSuite of protocols
    💡 Explanation:

    TCP/IP is a suite of communication protocols used on the Internet.

  10. Q10easy

    A company that provides internet access to customers is called an

    1. AWeb host
    2. BISP
    3. CDNS server
    4. DGateway
    💡 Explanation:

    An ISP (Internet Service Provider) provides internet access to users.

  11. Q11easy

    In a client-server network, the computer that provides services is the

    1. AServer
    2. BClient
    3. CRouter
    4. DNode
    💡 Explanation:

    The server provides resources and services to client computers.

  12. Q12hard

    Which device connects networks that use different protocols

    1. AHub
    2. BRepeater
    3. CGateway
    4. DSwitch
    💡 Explanation:

    A gateway connects networks using different protocols or architectures.

  13. Q13medium

    A private network used within an organization is called a/an

    1. AInternet
    2. BExtranet
    3. CISP
    4. DIntranet
    💡 Explanation:

    An intranet is a private network used within an organization.

  14. Q14medium

    Ethernet is a technology mainly used in

    1. AWANs
    2. BLANs
    3. CSatellites
    4. DTelephone networks
    💡 Explanation:

    Ethernet is the most common technology used in local area networks.

  15. Q15medium

    Which of the following is a network layer device

    1. ARouter
    2. BHub
    3. CRepeater
    4. DCable
    💡 Explanation:

    A router operates at the network layer of the OSI model.

  16. Q16medium

    POP3 and IMAP protocols are used to

    1. ASend emails
    2. BTransfer files
    3. CBrowse websites
    4. DReceive and retrieve emails
    💡 Explanation:

    POP3 and IMAP are used to receive and retrieve emails from a server.

  17. Q17easy

    Which network covers the smallest geographical area

    1. AWAN
    2. BMAN
    3. CInternet
    4. DLAN
    💡 Explanation:

    A LAN covers the smallest area, such as a single office or building.

  18. Q18Past Paper · PPSC/FPSC/NTSmedium

    Which system translates domain names into IP addresses

    1. ADHCP
    2. BDNS
    3. CFTP
    4. DSMTP
    💡 Explanation:

    DNS (Domain Name System) translates domain names into IP addresses.

  19. Q19medium

    Which protocol automatically assigns IP addresses to devices

    1. ADHCP
    2. BDNS
    3. CHTTP
    4. DSMTP
    💡 Explanation:

    DHCP (Dynamic Host Configuration Protocol) assigns IP addresses automatically.

  20. Q20Past Paper · PPSC/FPSC/NTSmedium

    Which transmission medium offers the highest speed and bandwidth

    1. ATwisted pair
    2. BCoaxial cable
    3. CFiber optic
    4. DTelephone wire
    💡 Explanation:

    Fiber optic cable offers the highest speed and bandwidth.

  21. Q21medium

    Fiber optic cables transmit data in the form of

    1. AElectricity
    2. BSound
    3. CRadio waves
    4. DLight
    💡 Explanation:

    Fiber optic cables carry data as pulses of light.

  22. Q22medium

    The amount of data that can be transmitted in a given time is called

    1. ALatency
    2. BBandwidth
    3. CFrequency
    4. DTopology
    💡 Explanation:

    Bandwidth is the amount of data transmitted per unit of time.

  23. Q23medium

    In simplex transmission, data flows

    1. AIn one direction only
    2. BIn both directions at once
    3. CIn both directions but one at a time
    4. DRandomly
    💡 Explanation:

    Simplex transmission allows data to flow in only one direction.

  24. Q24Past Paper · PPSC/FPSC/NTSeasy

    LAN stands for

    1. ALarge Area Network
    2. BLocal Access Node
    3. CLocal Area Network
    4. DLinked Area Network
    💡 Explanation:

    LAN stands for Local Area Network, covering a small area like a building.

  25. Q25Past Paper · PPSC/FPSC/NTSeasy

    WAN stands for

    1. AWide Area Network
    2. BWireless Access Node
    3. CWeb Area Network
    4. DWide Access Network
    💡 Explanation:

    WAN stands for Wide Area Network, spanning large geographical areas.

  26. Q26Past Paper · PPSC/FPSC/NTSmedium

    Which protocol is used to send emails

    1. AHTTP
    2. BFTP
    3. CPOP3
    4. DSMTP
    💡 Explanation:

    SMTP (Simple Mail Transfer Protocol) is used to send emails.

  27. Q27Past Paper · PPSC/FPSC/NTSeasy

    The Internet is an example of a

    1. ALAN
    2. BWAN
    3. CPAN
    4. DMAN
    💡 Explanation:

    The Internet is the largest example of a Wide Area Network (WAN).

  28. Q28easy

    A network that covers a city is called a

    1. ALAN
    2. BWAN
    3. CMAN
    4. DPAN
    💡 Explanation:

    A MAN (Metropolitan Area Network) covers a city-sized area.

  29. Q29medium

    The physical or logical arrangement of a network is called its

    1. ATopology
    2. BProtocol
    3. CBandwidth
    4. DGateway
    💡 Explanation:

    Network topology is the arrangement of devices and connections in a network.

  30. Q30Past Paper · PPSC/FPSC/NTSmedium

    In which topology are all devices connected to a central hub or switch

    1. ABus
    2. BRing
    3. CMesh
    4. DStar
    💡 Explanation:

    In a star topology every device connects to a central hub or switch.

  31. Q31Past Paper · PPSC/FPSC/NTSmedium

    In which topology do all devices share a single backbone cable

    1. AStar
    2. BBus
    3. CRing
    4. DMesh
    💡 Explanation:

    In a bus topology all devices connect to one common backbone cable.

  32. Q32medium

    In which topology is every device connected to every other device

    1. AStar
    2. BBus
    3. CMesh
    4. DRing
    💡 Explanation:

    In a mesh topology each device has a direct link to every other device.

  33. Q33Past Paper · PPSC/FPSC/NTSmedium

    A device that connects two different networks and routes data between them is a

    1. ARouter
    2. BHub
    3. CRepeater
    4. DNIC
    💡 Explanation:

    A router connects different networks and routes data packets between them.

  34. Q34medium

    A device that simply broadcasts incoming data to all its ports is a

    1. ARouter
    2. BSwitch
    3. CBridge
    4. DHub
    💡 Explanation:

    A hub broadcasts data to all connected ports without filtering.

  35. Q35medium

    A device that connects LAN devices and forwards data only to the intended device is a

    1. AHub
    2. BSwitch
    3. CRepeater
    4. DModem
    💡 Explanation:

    A switch forwards data only to the port of the intended recipient.

  36. Q36medium

    A device that amplifies or regenerates a weak signal is a

    1. ARouter
    2. BGateway
    3. CRepeater
    4. DSwitch
    💡 Explanation:

    A repeater regenerates and amplifies signals to extend network distance.

  37. Q37Past Paper · PPSC/FPSC/NTSmedium

    NIC stands for

    1. ANetwork Interface Card
    2. BNetwork Internet Connection
    3. CNode Interface Channel
    4. DNew Interface Card
    💡 Explanation:

    NIC stands for Network Interface Card, which connects a computer to a network.

  38. Q38medium

    A modem is used to

    1. AStore data
    2. BPrint documents
    3. CCool the CPU
    4. DConvert digital signals to analog and vice versa
    💡 Explanation:

    A modem modulates and demodulates signals for transmission over lines.

  39. Q39Past Paper · PPSC/FPSC/NTSmedium

    An IPv4 address is how many bits long

    1. A16 bits
    2. B32 bits
    3. C64 bits
    4. D128 bits
    💡 Explanation:

    An IPv4 address is 32 bits long, written as four octets.

  40. Q40Past Paper · PPSC/FPSC/NTSmedium

    An IPv6 address is how many bits long

    1. A32 bits
    2. B64 bits
    3. C128 bits
    4. D256 bits
    💡 Explanation:

    An IPv6 address is 128 bits long, allowing far more addresses than IPv4.

  41. Q41medium

    A MAC address is also known as the

    1. APhysical hardware address
    2. BLogical address
    3. CDomain address
    4. DPort address
    💡 Explanation:

    A MAC address is the physical hardware address of a network device.

  42. Q42Past Paper · PPSC/FPSC/NTSmedium

    How many layers does the OSI model have

    1. A4
    2. B5
    3. C6
    4. D7
    💡 Explanation:

    The OSI reference model has 7 layers.

  43. Q43medium

    Which is the lowest (first) layer of the OSI model

    1. ANetwork
    2. BPhysical
    3. CTransport
    4. DApplication
    💡 Explanation:

    The Physical layer is the lowest layer of the OSI model.

  44. Q44Past Paper · PPSC/FPSC/NTSeasy

    Which protocol is used to transfer web pages

    1. AFTP
    2. BSMTP
    3. CHTTP
    4. DDHCP
    💡 Explanation:

    HTTP (HyperText Transfer Protocol) is used to transfer web pages.

  45. Q45Past Paper · PPSC/FPSC/NTSeasy

    Which protocol is used to transfer files between computers

    1. AFTP
    2. BHTTP
    3. CSMTP
    4. DDNS
    💡 Explanation:

    FTP (File Transfer Protocol) is used to transfer files between computers.

More Computer Topics

📖
Computer Fundamentals & Introduction45 MCQs
→📖
Generations & History of Computers45 MCQs
→📖
Input & Output Devices45 MCQs
→📖
CPU, Memory & Storage45 MCQs
→📖
Operating Systems45 MCQs
→📖
MS Word45 MCQs
→

See all Computer topics →

Get instant alerts & apply faster — install the free appInstall App