3dx7x Vol 1: Unit 5

16 Questions

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3dx7x Vol 1: Unit 5

Networks and Network Devices


Questions and Answers
  • 1. 
    The design of communications network is known as
    • A. 

      An internet suite

    • B. 

      The physical layer

    • C. 

      Network architecture

    • D. 

      Network implementation

  • 2. 
    What kind of network is a group of computers and associated devices that share a common communications line within a small geographic area?
    • A. 

      Metropolitan Area Network (MAN)

    • B. 

      Virtual Private Network (VPN)

    • C. 

      Local Area Network (LAN)

    • D. 

      Wide Area Network (WAN)

  • 3. 
    What kind of network interconnects users with computer resources in a geographic area or a region like a city?
    • A. 

      Local Area Network (LAN)

    • B. 

      Wide Area Network (WAN)

    • C. 

      Virtual Private Network (VPN)

    • D. 

      Metropolitan Area Network (MAN)

  • 4. 
    Which 802.11 standard is designed to operate at both 2.4GHz and 5 GHz?
    • A. 

      802.11a

    • B. 

      802.11b

    • C. 

      802.11g

    • D. 

      802.11n

  • 5. 
    Which 802.11 standard has a throughput of 11 Mbps and runs at the 2.4 GHz frequency?
    • A. 

      802.11a

    • B. 

      802.11b

    • C. 

      802.11g

    • D. 

      802.11n

  • 6. 
    What topology defines the layout of a network's devices and media?
    • A. 

      Physical

    • B. 

      Logical

    • C. 

      Hybrid

    • D. 

      Star

  • 7. 
    What topology consists of cable segments from each computer connected to a centralized component?
    • A. 

      Star

    • B. 

      Bus

    • C. 

      Ring

    • D. 

      Hybrid

  • 8. 
    Over a single pair cable, Integrated Services Digital Network (ISDN) is capable of transmission rates of
    • A. 

      256 Kbps

    • B. 

      256 Mbps

    • C. 

      144 Mbps

    • D. 

      144 Kbps

  • 9. 
    A modem is a device that
    • A. 

      Transmits on every link attached to it

    • B. 

      Modulates and demodulates data signals

    • C. 

      Uses algorithms to determine optimal path to end destination

    • D. 

      Operates on the Network layer of the Open Systems Interconnection (OSI) modelr

  • 10. 
    What Data Link Layer network device logically separates a single network into two segments or collision domains in Ethernet networks?
    • A. 

      Hub

    • B. 

      Bridge

    • C. 

      Switch

    • D. 

      Router

  • 11. 
    Two basic routing activities are determining optimal routing paths and
    • A. 

      Modulation of Datagram through an internetwork

    • B. 

      Layer-1 error determination and correction through an internetwork

    • C. 

      Virtual Private Network (VPN) tunnel determination through an internetwork

    • D. 

      Transporting information groups (packets) through an internetwork

  • 12. 
    Dynamic routing automatically calculates the best path between how many nodes?
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      5

  • 13. 
    What type of encryption is applied to each end of a communications line in a distributed network, and ensures all information flowing is unintelligible to an unauthorized intruder?
    • A. 

      Line encryption

    • B. 

      Link encryption

    • C. 

      Device encryption

    • D. 

      End-to-End encryption

  • 14. 
    Which type of cable is associated with the original designs of the Ethernet standard?
    • A. 

      Coaxial cable

    • B. 

      Fiber optic cable

    • C. 

      Shielded twisted-pair (STP)

    • D. 

      Unshielded twisted-pair (UTP)

  • 15. 
    Which transmission medium is the primary carrier of voice communications?
    • A. 

      Twisted pair cable

    • B. 

      Fiber optic cable

    • C. 

      Coaxial cable

    • D. 

      Twinax cable

  • 16. 
    What is the most common wireless networking standard?
    • A. 

      802.3

    • B. 

      802.9

    • C. 

      802.11

    • D. 

      802.14