项目目标是项目规划的()
现在有10台PC组成的网络环境,与Internet正常连接,现有一使用者发现其无法正常浏览WEB网页,但他可以ping通本地网络中的其他PC,使用nslookup命令可以查询到目的网页的IP地址,接下来可以选择的必要的测试方法有哪些()。
A使用ping命令测试与目的网页IP之间的网络连通性
B使用tracer命令测试本地网络之间的路径选择
C使用routerprint察看本地网络的出口路由
D任选其他高性能网站测试本地到Internet的普通连通性
public class X implements Runnable ( private int x; private int y; public static void main(String args) ( X that = new X(); (new Thread(that)) . start( ); (new Thread(that)) . start( ); ) public synchronized void run( ) ( for (;;) ( x++; y++; System.out.printIn(“x = “ + x + “, y = “ + y); ) ) ) What is the result?()
A、 An error at line 11 causes compilation to fail.
B、 Errors at lines 7 and 8 cause compilation to fail.
C、 The program prints pairs of values for x and y that might not always be the same on the same line (for example, “x=2, y=1”)
D、 The program prints pairs of values for x and y that are always the same on the same line (forexample, “x=1, y=1”. In addition, each value appears twice (for example, “x=1, y=1” followed by “x=1, y=1”)
E、 The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears twice (for example, “x=1, y=1” followed by “x=2s, y=2”)
为了实现类型不同的子网互联,OSI参考模型把网络划分成多格子网,以下那几个属于这几个子层?
两端用户传输文件,应属于下列OSI的哪一层处理?()
A、表示层
B、会话层
C、传输层
D、应用层
在Java语言中,不能注释多行内容的符号是()。
A、以//开始的注释
B、以/*开始,*/结束的注释
C、以/**开始,*/结束的注释
D、以上都不能