Z3dx7x Vol 1 Unit 5

16 Questions

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Z3dx7x Vol 1 Unit 5 - Quiz

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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. 

      MAN

    • B. 

      VPN

    • C. 

      LAN

    • D. 

      WAN

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

      LAN

    • B. 

      WAB

    • C. 

      VPN

    • D. 

      MAN

  • 4. 
    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

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

      Bus

    • B. 

      Star

    • 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. 

      Modulates and demodulates data signals

    • B. 

      Uses algorithms to determine optimal path to end destination.

    • C. 

      Transmits on every link attached to it.

    • D. 

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

  • 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 datagrams 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

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