首推全速向右!A.Bow stern full to port!B.Bow stern half to port!C.Bow thrust full to starboard !D.Bow thrust full to port!

题目

首推全速向右!

A.Bow stern full to port!

B.Bow stern half to port!

C.Bow thrust full to starboard !

D.Bow thrust full to port!


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  • 第1题:

    Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet? (Select two answer choices.)

    A.Full-duplex Ethernet uses CSMA/CD to prevent collisions.

    B.Half-duplex Ethernet uses a loopback circuit to detect collisions.

    C.A full-duplex Ethernet card allows 20Mbps for data transmission.

    D.Full-duplex Ethernet makes use of two pairs of wires for data.

    E.An Ethernet hub can operate both half and full duplex simultaneously.


    正确答案:BD
    解析:Explanation:
    Half-duplex Ethernet send and receives on the same line, so a loopback needs to be set to detect collisions. Alternatively, full-duple Ethernet doesn't have to because it uses two pairs of wire, one to send and the other to receive. Collisions are not possible on full duplex Ethernet networks.

    Incorrect Answers:
    A. Full duplex uses both pairs of wires, so transmissions are sent on the first pair, and data that is received come in on the other pair. This prevents collisions.

    C. Full duplex allows for data to be sent and received at the same time. It will not double the amount of bandwidth at any given time. The speed of the Ethernet link will remain at 10/100.

    E. Hubs are shared devices and can only support one mode, unlike switches.

  • 第2题:

    WhatarethetwoparallelSCSIspecifications?()

    A.Upto25mbuslength

    B.OnlyonedeviceperSCSIbus

    C.Upto16devicesperSCSIbus

    D.Half-duplexoperation

    E.Full-duplexoperation


    参考答案:A, C

  • 第3题:

    在stern双电层模型中,通常情况,z 电势略低于Stern电势φδ。


    正确

  • 第4题:

    What are the differences between full-duplex Ethernet and half-duplex Ethernet?()

    A. Half-duplex Ethernet operates in a shared collision domain.

    B. Full-duplex Ethernet has a lower effective throughput.

    C. Half-duplex Ethernet operates in a private collision domain.

    D. Full-duplex Ethernet allows two-way communication.

    E. Half-duplex Ethernet operates in a private broadcast domain.


    参考答案:A, D

  • 第5题:

    Which of the following underlined parts is different in pronunciation from others?

    A. term
    B. serve
    C. very
    D. stern

    答案:C
    解析:
    考查字母组合的发音。题干问哪个单词的画线部分和其他画线部分的读音不同。