3DX7X Vol 1: Unit 4

18 Questions | Total Attempts: 233

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3DX7X Vol 1: Unit 4

Network Fundamentals


Questions and Answers
  • 1. 
    Network switches and bridges operate at what Open System Interconnect (OSI) layer?
    • A. 

      Network

    • B. 

      Physical

    • C. 

      Data Link

    • D. 

      Transport

  • 2. 
    The Institute of Electrical and Electronics Engineers (IEEE) divides the Open System Interconnect (OSI) Data Link Layers into what two sublayers?
    • A. 

      High Level Data Link Control (HDLC) and Synchronous Data Link Control (SDLC)

    • B. 

      Logical Link Control (LLC) and Media Access Control (MAC)

    • C. 

      Distance Vector and Link State

    • D. 

      RS-232 and RS-530

  • 3. 
    Routers operate at what Open System Interconnect (OSI) layer?
    • A. 

      Network

    • B. 

      Physical

    • C. 

      Data Link

    • D. 

      Transport

  • 4. 
    Virtual circuits are established, maintained, and terminated at what Open System Interconnect (OSI) layer?
    • A. 

      Network

    • B. 

      Physical

    • C. 

      Data Link

    • D. 

      Transport

  • 5. 
    What is the combat information technology (IT) communication support agency of the DoD called?
    • A. 

      Defense Intelligence Agency

    • B. 

      Defense Information System Agency

    • C. 

      Defense Information Systems Network

    • D. 

      Department of Defense Information Networks

  • 6. 
    Who must provide encryption devices for connection to the Secret Internet Protocol (IP) Data service?
    • A. 

      The customer

    • B. 

      Security Manager

    • C. 

      National Security Agency

    • D. 

      Communications Squadron

  • 7. 
    What are the two classifications of transport protocols?
    • A. 

      Connection Oriented and Connectionless Oriented

    • B. 

      Classful and Connectionless Oriented

    • C. 

      Connectionless Oriented and Classless

    • D. 

      Classful and Classless

  • 8. 
    In a connection-oriented protocol, such as Transmission Control Protocol (TCP), what must happen before data is transmitted between clients?
    • A. 

      Authorization

    • B. 

      Connection establishment

    • C. 

      Establishment of a clear channel

    • D. 

      End-to-end connectivity between host applications

  • 9. 
    What regulates how much information passes over a Transmission Control Protocol (TCP) connection before the receiving host must send an acknowledgement?
    • A. 

      Data receive message

    • B. 

      Sliding Window

    • C. 

      Buffer

    • D. 

      Socket

  • 10. 
    Which of these lists the fields in the User Datagram Protocol (UDP) segment?
    • A. 

      Source Port, Destination Port, Length, Checksum, Data

    • B. 

      Source Port, Destination Port, Length, Windowing, Data

    • C. 

      Source Port, Destination Port, Length, Acknowledgement, Data

    • D. 

      Channel Clear, Source Port, Destination Port, Length, Checksum, Data

  • 11. 
    How many bits are in an Internet Protocol version 4 (IPv4) address?
    • A. 

      16

    • B. 

      32

    • C. 

      64

    • D. 

      128

  • 12. 
    What class uses a range of 1-126 in the first octet of an Internet Protocol version 4 (IPv4)?
    • A. 

      Class A

    • B. 

      Class B

    • C. 

      Class C

    • D. 

      Class D

  • 13. 
    What Internet Protocol version 4 (IPv4) class address is used for networks with about 250 nodes?
    • A. 

      Class C

    • B. 

      Class D

    • C. 

      Class E

    • D. 

      Class F

  • 14. 
    What Internet Protocol version 4 (IPv4) class address is used for multicast addressing?
    • A. 

      Class C

    • B. 

      Class D

    • C. 

      Class E

    • D. 

      Class F

  • 15. 
    What Internet Protocol version 4 (IPv4) reserved address is used for loop back?
    • A. 

      0.0.0.0

    • B. 

      127.0.0.1

    • C. 

      207.55.157.255

    • D. 

      255.255.255.255

  • 16. 
    Instead of using binary, how are Internet Protocol version 6 (IPv6) addresses expressed to be more user-friendly?
    • A. 

      Colon Hexadecimal Format

    • B. 

      Dotted Decimal Notation

    • C. 

      Hexadecimal

    • D. 

      Octal

  • 17. 
    The range of well-known port numbers is
    • A. 

      1024 to 49151

    • B. 

      49152 to 65535

    • C. 

      0 to 1023

    • D. 

      0 to 1024

  • 18. 
    Which common port contains Hyper Text Transfer Protocol (HTTP) servers and proxies?
    • A. 

      Port 80

    • B. 

      Port 110

    • C. 

      Port 443

    • D. 

      Port 8080

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