By default, which of the following ports would a network need to have opened to allow for thetransmission of incoming and outgoing email?() (Select TWO).A.21B.25C.80D.110E.123

题目
By default, which of the following ports would a network need to have opened to allow for thetransmission of incoming and outgoing email?() (Select TWO).

A.21

B.25

C.80

D.110

E.123

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3.“Was the park ________ yesterday?” “Yes, It ________ at nine in the morning”A.opened…openB.open…was openC.open…openedD.opened…opened

4.下面程序的输出结果是( )。 public class Sun { public static void main(String args[ ]) { int i = 1; switch (i) { case 0: System.out.println("zero"); break; case 1: System.out.println("one"); case 2; System.out.println("two"); default: System.out.println("default"); } } }A．oneB．one，defaultC．one，two，defaultD．default

更多“By default, which of the following ports would a network need to have opened to allow for thetransmission of incoming and outgoing email?() (Select TWO). ”相关问题

  • 第1题：

    下面程序的输出结果是( )。 public class Sun { public static void main(String args[ ]) { int i = 1; switch (i) { case 0: System.but.println("zero"); break; case 1: System.out.println("one"); case 2: System.out.println("two"); default: System.out.println ("default"); } } }

    A．one

    B．one, default

    C．one, two, default

    D．default


    正确答案：C
    解析：该题考查对switch-case-break的理解。每个分支语句后面必须有break语句，否则程序向下执行，直到遇到break语句或程序结束。所以，该题i=1时执行casel分支语句，而casel分支语句后没有break语句，程序继续向下执行case2分支语句和 default分支语句。A只执行了case 1：B只执行了casel和default；C：只执行了default。故本题的正确答案是C。

  • 第2题：

    Anetworkadministratorhasa10base2network.Acardisprovidedthathasboth10base2and10base5ports.WhichofthefollowingtypesofcablesshouldbeselectedinSMITduringconfigurationoftheadapter?()

    A.TP

    B.BNC

    C.DIX

    D.CAT5


    参考答案：B

  • 第3题：

    给定如下Java代码片段，编译运行时的结果是（） int i=2; switch（i) { default: System.out.println（“default”); case 0: System.out.println（“zero”); break; case 1: System.out.println（“one”); case 2: System.out.println（“two”); }

    A．输出：default

    B．输出：default zero

    C．编译出错，default 语句位置不符合switch结构的语法结构

    D．输出two


    输出：135

  • 第4题：

    编译和执行以下代码，输出结果是( )。 int i=1; switch (i) { case 0: System.out.print("zero,"); break; case 1: System.out.print("one,"); case 2: System.out.print("two,"); default: System.out.println("default"); }

    A．one，

    B．one,two,

    C．one,two,default

    D．default


    正确答案：C

  • 第5题：

    有如下代码段：

    switch ( x ){

    case 1:System.out.println("One");break;

    case 2:

    case 3:System.out.println("Two");break;

    default:System.out.println("end");

    }

    变量x的取值下列哪些情形时，能使程序输出"Two" 。

    A. 1

    B. 2

    C. 3

    D. default


    正确答案：BC

  • 第6题：

    15、用户防火墙的规则优先于其他位置配置的防火墙规则（例如Incoming/Outgoing规则）。


    防火墙规则由3个部分组成：规则号，过滤域和动作域

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