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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 dete

题目

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.

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更多“Which of the following statements correctly describe the differences between half－duplex a ”相关问题

  • 第1题：

    3．Is her lifestyle. the same as yours or ________? What are the________?

    A． difference， different

    B． different ，difference

    C． different ，differences

    D． difference ， differences


    正确答案：C

  • 第2题：

    I don't quite follow what she is saying.

    A:observe
    B:understand
    C:explain
    D:describe

    答案：B
    解析：

  • 第3题：

    he government issued a warning to local companies that all waste must be disposed of_________ or they will face heavy fines.

    A. corrects
    B. correcting
    C. correction
    D. correctly

    答案：D
    解析：
    政府向当地企业发出警告：所有废弃物必须妥善处理，否则企业将被处以大量罚金。allwaste must be disposed of语法结构完整，横线处应填人修饰be disposed of的副词，故D为正确答案。

  • 第4题：

    English teachers often ask students to __________ a passage to get the gist of it.

    A．skim
    B．scan
    C．predict
    D．describe

    答案：A
    解析：
    考查英语阅读策。读(skim)指快速阅读文章以了解其内容大意(gist)的阅读方法。换句话说，读是要求读者有选择地进行阅读，可跳过某些细节，以求抓住文章(gist)的大概，从而加快阅读速度。因此选A。

  • 第5题：

    Norman Blarney is an artist of deep convictions.

    A: claims
    B:suggestions
    C: beliefs
    D:statements

    答案：C
    解析：
    句意：诺曼.布莱梅是一个有坚定信念的艺术家，句中画线部分conviction意为 “信念”。claim意为“要求，声称”。suggestion意为“建议”。belief意为“相信，信赖”。 statement意为“声明，陈述”。画线部分和C项意义接近。故选C项。

  • 第6题：

    有一份数据，需要查看数据的类型，并将部分数据做强制类型转换，以及对数值型数据做基本的描述性分析。下列的步骤和方法正确的是（）

    A．dypes 查看类型，asype转换类别，describe 描述性统计

    B．astype 查看类型，dtypes 转换类别、describe 描述性统计

    C．describe 查看类型，astype 转换类别，dtypes 描述性统计

    D．dtypes查看类型，describe转换类别，astype 描述性统计


    C、GetType()

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