●A multimedia system allows end users to share,transfer and process avariety of forms of information in a(1)manller． (1)A．fixed B．fix C．unifying D．unified 答案：(1)D 解析：一个多媒体系统可以让用户在一个统一的方式下共享、传输、处理各种各样的信息。 ●Melissa and Love Letter made use of the trust that exists between friends or colleagues．Imagine receiving an(2)from a friend who asks you to open it．This is what happens with Melissa and several other similar email(3)．Upon running，such worms usually proceed to send themselves out to email addresses from the victim’s address book，previous emails，web pages(4)。 As administrators seek to block dangerous email attachments through the recognition of well-known(5)，virus writers use other extensions to circumvent such protection．Executable(．exe)files are renamed to．bat and．cmd plus a whole list of other extensions and will still run and successfully infect target users．Frequently，hackers try to penetrate networks by sending an attachment that looks like a flash movie，which，while displaying some cute animation，simultaneously runs commands in the background to steal your passwords and give the(6)access to your network． (2)A．attachment B．packet C．datagram D．message (3)A．virtual B．virus C．worms D．bacteria (4)A．memory B．caches C．ports D．registers (5)A．names B．cookies C．software D．extensions (6)A．cracker B．user C．ustomer D．client 答案：(2)A (3)B (4)D (5)C (6)A 解析：梅莉莎和爱虫病毒利用了朋友和同事们之间的信任。假设你从一个朋友那里收到一个附件，且这个朋友要求你打开这个附件，这就是梅莉莎和其它几个病毒耍的小花招，通过运行。这些蠕虫通常利用一些来自被侵入的电脑主人的通讯簿、早先的电子邮件、网页注册者的地址把自己发送出去。 随着管理员开始通过使用著名的软件鉴别附件来阻止危险的电子邮件，病毒编写者通过其它一些扩展名来绕过这种保护。可执行文件被冲命名为．bat和．cmd加上一大堆其它扩展名可以同样被执行并且成功感染目标用户。黑客们经常试图发送一个看起来很想flash电影的附件，flash电影看起来有点活波可爱，同时在后台运行一些命令来偷取你的密码，以此来获得侵入你的网络的通道来入侵这个网络。