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”)
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
呼叫转移是指用户可根据不同情况设置来电转移到预先设定的()上。
A、留言信箱
B、市话
C、其他手机
D、电脑
In your production database, data manipulation language (DML) operations are executed on theSALES table. You have noticed some dubious values in the SALES table during the last few days. Youare able to track users, actions taken, and the time of the action for this particular period but the changesin data are not tracked. You decide to keep track of both the old data and new data in the table along withthe user information. What action would you take to achieve this task()
A、Apply fine-grained auditing.
B、Implement value-based auditing.
C、Impose standard database auditing to auditobject privileges.
D、Impose standard databaseauditing to audit SQL statements.
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?