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Introduction to Computer Networks

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  1. ١

    In Internet terminology, a 'host' is the same as a:

  2. ٢

    Internet standards are published as documents called:

  3. ٣

    A protocol defines the ______ and ______ of messages exchanged, plus the actions taken.

  4. ٤

    Which access technology uses a DEDICATED line and transmits voice and data at different frequencies?

  5. ٥

    The time to transmit an L-bit packet onto a link of rate R bps is:

  6. ٦

    Moving a packet from a router's input to the appropriate output is called:

  7. ٧

    Which switching approach reserves end-to-end resources for a call before data is sent?

  8. ٨

    In FDM, each call is allocated:

  9. ٩

    The average end-to-end throughput of a path is determined by the:

  10. ١٠

    In the Internet protocol stack, which layer is responsible for process-to-process data transfer (TCP, UDP)?

  11. ١١

    The Internet can be described as a 'network of networks' made of interconnected ISPs.

  12. ١٢

    A cable access network provides each home a dedicated (unshared) link to the headend.

  13. ١٣

    Fiber optic cable offers high speed, low error rate, and immunity to electromagnetic interference.

  14. ١٤

    With store-and-forward, a router can begin transmitting a packet on the next link before the whole packet arrives.

  15. ١٥

    Routing is a global action that determines the source-to-destination path.

  16. ١٦

    Packet switching is well suited to bursty data and needs no call setup.

  17. ١٧

    Queueing delay is fixed and does not depend on network congestion.

  18. ١٨

    Propagation delay is computed as d/s, where d is the link length and s the propagation speed.

  19. ١٩

    A packet arriving at a full router buffer is dropped (lost).

  20. ٢٠

    The OSI model adds Presentation and Session layers that the Internet stack does not have.

  21. ٢١

    Match each Internet-stack layer with an example protocol.

    • Application
    • Transport
    • Network
    • Link

    الإجابات

  22. ٢٢

    Match each core function/switching concept.

    • Forwarding
    • Routing
    • Circuit switching
    • Packet switching

    الإجابات

  23. ٢٣

    Match each delay component with its formula/meaning.

    • Transmission delay
    • Propagation delay
    • Processing delay
    • Queueing delay

    الإجابات

  24. ٢٤

    Match each encapsulation unit with its layer.

    • Segment
    • Datagram
    • Frame
    • Message

    الإجابات

  25. ٢٥

    Match each access/technology term with its description.

    • DSL
    • HFC (cable)
    • 802.11
    • IXP

    الإجابات

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