在本练习中，您会使用常用的网络工具。对于下面的每一部分，捕获相应的程序输出，包括它与你的问题的答案。第 1 部分： netstat作为第一步，修改 Web 客户端，你写在练习 1 来计算，它发送和接收的字节数。您修改的客户机 ModifiedClient.java 的名字。接下来，使用命令 netstat-s 来确定为 IP 和 TCP 协议维护各种计数器的值。最后，使用您修改的 Web 客户端来检索某些 Web 页和事后检查计数器。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003240s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.102749s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002563s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002243s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002201s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003854s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002157s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003493s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017288s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001968s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 98826 [ RunTime:0.001083s ]
