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Data Communication & Networking — GK Questions with Answers

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52 questions
  1. Sending data between two or more computers over communication links is called —
    1. Communication
    2. Networking
    3. Data communication
    4. Data networking
    Show answer

    Answer: (C) Data communication

    Data communication.

  2. How many types of communication channel are there?
    1. 1
    2. 2
    3. 3
    4. 4
    Show answer

    Answer: (C) 3

    Three.

  3. In a simplex channel the flow of data is —
    1. Always in one direction
    2. Always in both directions
    3. In both directions, but one at a time
    4. All of these
    Show answer

    Answer: (A) Always in one direction

    One direction.

  4. What type of transmission is there between a computer and a keyboard?
    1. Automatic
    2. Half duplex
    3. Full duplex
    4. Simplex
    Show answer

    Answer: (D) Simplex

    Simplex.

  5. Which channel does a mobile phone illustrate?
    1. Simplex
    2. Half duplex
    3. Full duplex
    4. None
    Show answer

    Answer: (C) Full duplex

    Full duplex.

  6. Which is not a property of twisted pair cabling?
    1. Relatively low speed
    2. The wires can be shielded
    3. The wires can be unshielded
    4. It carries signals as light waves
    Show answer

    Answer: (D) It carries signals as light waves

    Light is carried by fibre.

  7. The outer layer around the twisted wires is called the —
    1. Frame
    2. Cover
    3. Disk
    4. Jacket
    Show answer

    Answer: (D) Jacket

    Jacket.

  8. The greatest advantage of co-axial cabling —
    1. High security
    2. Physical dimensions
    3. Long distances
    4. Easily tapped
    Show answer

    Answer: (C) Long distances

    Communication over long distances.

  9. The cable that can transmit data at high speeds —
    1. Flat cable
    2. Co-axial cable
    3. Optic fibre cable
    4. Twisted pair cable
    Show answer

    Answer: (C) Optic fibre cable

    Optic fibre.

  10. An advantage of fibre optics —
    1. Resistance to data theft
    2. Fast data transmission rate
    3. Low noise level
    4. All of the above
    Show answer

    Answer: (D) All of the above

    All three.

  1. Which is not a property of fibre optic cabling?
    1. Faster than copper
    2. Easier to capture a signal than from copper
    3. Very resistant to interference
    4. Carries signals as light waves
    Show answer

    Answer: (B) Easier to capture a signal than from copper

    It is hard to tap fibre.

  2. What do we call a device that joins a network with no cables —
    1. Distributed
    2. Cabled
    3. Centralised
    4. Wireless
    Show answer

    Answer: (D) Wireless

    Wireless.

  3. The fastest communication channel —
    1. Radio wave
    2. Microwave
    3. Optical fibre
    4. All nearly the same
    Show answer

    Answer: (C) Optical fibre

    Optical fibre.

  4. Bandwidth refers to —
    1. The cost of cable for a WAN
    2. The cost of cable for a LAN
    3. The amount a peer-to-peer network can store
    4. How much information a medium can carry in a set time
    Show answer

    Answer: (D) How much information a medium can carry in a set time

    Capacity relative to time.

  5. The fastest data transmission speed —
    1. Bandwidth
    2. bps
    3. Gbps
    4. kbps
    Show answer

    Answer: (C) Gbps

    Gbps.

  6. Computers linked so as to pool resources and data are a —
    1. Internet
    2. Network
    3. Backbone
    4. Hyperlink
    Show answer

    Answer: (B) Network

    A network.

  7. Hardware plus software that lets computers communicate is a —
    1. Network
    2. Backup system
    3. Server
    4. Peripheral
    Show answer

    Answer: (A) Network

    A network.

  8. Which term is associated with networks?
    1. MS-Excel
    2. Mouse
    3. Word
    4. Connectivity
    Show answer

    Answer: (D) Connectivity

    Connectivity.

  9. The most likely shared resource in a computer network —
    1. Printers
    2. Speakers
    3. Floppy disk drives
    4. Keyboards
    Show answer

    Answer: (A) Printers

    Printers.

  10. The first network that planted the seeds of the Internet —
    1. ARPANET
    2. NSFnet
    3. V-net
    4. I-net
    Show answer

    Answer: (A) ARPANET

    ARPANET.

  1. A network whose elements are far apart, with dedicated high-speed phone lines —
    1. LAN
    2. WAN
    3. URL
    4. World Wide Web
    Show answer

    Answer: (B) WAN

    WAN.

  2. A LAN can use which architecture?
    1. Peer-to-peer
    2. Client and server
    3. Both
    4. Neither
    Show answer

    Answer: (C) Both

    Both.

  3. Ethernet, token ring and token bus are kinds of —
    1. WAN
    2. LAN
    3. Communication channels
    4. Physical media
    Show answer

    Answer: (B) LAN

    LAN.

  4. The advantage of a LAN —
    1. Sharing peripherals
    2. Backing up your data
    3. Saving all your data
    4. Accessing the Web
    Show answer

    Answer: (A) Sharing peripherals

    Sharing.

  5. A computer connected to a LAN can —
    1. Run faster
    2. Share information and/or peripheral equipment
    3. Go online
    4. E-mail
    Show answer

    Answer: (B) Share information and/or peripheral equipment

    Sharing.

  6. What allows LAN users to share programs and data —
    1. Communication server
    2. Print server
    3. File server
    4. All of the above
    Show answer

    Answer: (C) File server

    File server.

  7. What is the use of a bridge in a network?
    1. To connect LANs
    2. To separate LANs
    3. To control network speed
    4. All of the above
    Show answer

    Answer: (A) To connect LANs

    To connect LANs.

  8. Which item is not used in a LAN?
    1. Interface card
    2. Cable
    3. Computer
    4. Modem
    Show answer

    Answer: (D) Modem

    A modem is for WAN/phone lines.

  9. The type of network that would use phone lines —
    1. WAN
    2. LAN
    3. WWAN
    4. Wireless
    Show answer

    Answer: (A) WAN

    WAN.

  10. The most important/powerful computer in a typical network —
    1. Desktop
    2. Network client
    3. Network server
    4. Network station
    Show answer

    Answer: (C) Network server

    The network server.

  1. An agreement between the parties on how communication is to proceed —
    1. Path
    2. SLA
    3. Bond
    4. Protocol
    Show answer

    Answer: (D) Protocol

    A protocol.

  2. Which device works at the physical layer —
    1. Bridge
    2. Router
    3. Repeater
    4. All of these
    Show answer

    Answer: (C) Repeater

    Repeater.

  3. The device that joins multiple computers within one LAN —
    1. Repeater
    2. Hub
    3. Gateway
    4. Switch
    Show answer

    Answer: (D) Switch

    Switch (and hub).

  4. The device used for modulation and demodulation —
    1. Modem
    2. Protocols
    3. Gateway
    4. Multiplexer
    Show answer

    Answer: (A) Modem

    Modem.

  5. The function of a modem —
    1. Encryption and decryption
    2. Turns data into voice and voice into data
    3. Converts analog signals to digital and vice versa
    4. A hardware antivirus
    Show answer

    Answer: (C) Converts analog signals to digital and vice versa

    Analog ↔ digital.

  6. The hardware device or software that sends messages between networks —
    1. Bridge
    2. Backbone
    3. Router
    4. Gateway
    Show answer

    Answer: (C) Router

    Router.

  7. Which is not a network device?
    1. Router
    2. Switch
    3. Bus
    4. Bridge
    Show answer

    Answer: (C) Bus

    Bus is a topology.

  8. The geometric arrangement of devices on the network —
    1. Topology
    2. Protocols
    3. Media
    4. LAN
    Show answer

    Answer: (A) Topology

    Topology.

  9. Network components connected to the same cable — which topology?
    1. Star
    2. Ring
    3. Bus
    4. Mesh
    Show answer

    Answer: (C) Bus

    Bus.

  10. A hub is associated with which network?
    1. Bus
    2. Ring
    3. Star
    4. Mesh
    Show answer

    Answer: (C) Star

    Star.

  1. Only the computer that holds the ___ may send in a ring topology —
    1. Packet
    2. Data
    3. Access method
    4. Token
    Show answer

    Answer: (D) Token

    The token.

  2. In which topology is every node connected to two other nodes?
    1. Bus
    2. Ring
    3. Star
    4. Mesh
    Show answer

    Answer: (B) Ring

    Ring.

  3. The topology with bi-directional links between each possible node —
    1. Ring
    2. Star
    3. Tree
    4. Mesh
    Show answer

    Answer: (D) Mesh

    Mesh.

  4. The highest-reliability topology —
    1. Mesh
    2. Tree
    3. Bus
    4. Star
    Show answer

    Answer: (A) Mesh

    Mesh.

  5. P2P is what kind of application architecture?
    1. Client/server
    2. Distributed
    3. Centralised
    4. 1-tier
    Show answer

    Answer: (B) Distributed

    Distributed.

  6. Encryption and decryption belong to which OSI layer?
    1. Transport
    2. Session
    3. Presentation
    4. All of these
    Show answer

    Answer: (C) Presentation

    Presentation.

  7. The fourth layer of the OSI model —
    1. Application
    2. Data link
    3. Transport
    4. Session
    Show answer

    Answer: (C) Transport

    Transport.

  8. In the OSI architecture routing is done by —
    1. Network layer
    2. Data link layer
    3. Transport layer
    4. Session layer
    Show answer

    Answer: (A) Network layer

    Network layer.

  9. At which OSI layer does a switch operate?
    1. Data link
    2. Physical
    3. Transport
    4. Network
    Show answer

    Answer: (A) Data link

    Data link.

  10. Multiplexing involves how many paths and channels?
    1. One, one
    2. One, multiple
    3. Multiple, one
    4. Multiple, multiple
    Show answer

    Answer: (B) One, multiple

    One path, many channels.

  11. An Ethernet address is how many bits long?
    1. 64
    2. 48
    3. 32
    4. 16
    Show answer

    Answer: (B) 48

    48 bits.

  12. A small message passed from one station to another in networks —
    1. Token
    2. Byte
    3. Word
    4. Ring
    Show answer

    Answer: (A) Token

    Token.

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