黑客也就是英文Hacker的音译，Hacker这个单词源于动词Hack。目前将黑客的分成三类：________、________和________。

A . 出口商卖断票据 B . 进口商买断票据 C . 银行买断票据 D . 银行卖断票据 E . 政府买断票据

A . A、BELL实验室 B . B、麻省理工AI实验室 C . C、AT&T实验室

A . 正确 B . 错误

A . 出口商卖断票据 B . 进口商买断票据 C . 银行买断票据 D . 政府买断票据

A . A、朋克 B . B、海客 C . C、网虫 D . D、黑客

A . net user hacker$hacker/add B . net use hackerhacker/add C . net use rhackerhacker/add D . net use hacker$hacker/add

A . 正确 B . 错误

A . G：Green，代表绿色； B . O：Observant，用心； C . L：Light，代表阳光； D . F：Friendship，代表友谊

A . The attacking device spoofs a source MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device. B . Frames with unique， invalid destination MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports. C . The attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the destination address found in the Layer 2 frames sent by the valid network device. D . The attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the source address found in the Layer 2 frames sent by the valid network device. E . The attacking device spoofs a destination MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device. F . Frames with unique， invalid source MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports. G . None of the other alternatives apply

A .  An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the  802.1q encapsulation. B .  Configuring an interface with the "switchport mode dynamic" command will prevent VLAN  hopping. C .  Attacks are prevented by utilizing the port-security feature. D .  Configuring an interface with the "switchport mode access" command will prevent VLAN  hopping. E .  An end station attempts to redirect VLAN traffic by broadcasting multiple ARP requests.

A . A．一种病毒 B . B．一种游戏软件 C . C．一种不健康的网站 D . D．指利用不正当手段窃取计算机网络系统的口令和密码的人

A . 大规模 B . 开放 C . 在线 D . 课程 E . 小范围

A . 出口商卖断票据 B . 银行买断票据 C . 进口商买断票据 D . 银行卖断票据 E . 银行放弃对出口商所贴现款项的追索权

A . 网易 B . 谷歌 C . 新浪 D . 百度

Six pairs will compete in the Aug. 20 "Black OPS: Hack Attack Challenge 2004," organized by the government-funded National Infocomm Competency Center, said its marketing manager Yvonne Choo. They will "penetrate, exploit, gain access and obtain privileged information from the other teams' servers, for the purpose of corporate espionage," the center said on its Web site. Teams will also have to defend their organization's networks against hacking from other teams in the daylong event, it added. Choo said he hoped the contest would help shed light on ways to prevent actual computer attacks. The prize for the best hacker will be a DVD burner and free computer classes. Asia has been the root of some of the worst attacks by hackers in recent years. In May 2000, the so-called Love Bug virus, released in the Philippines, overwhelmed e mail systems worldwide and caused tens of millions of dollars in damage. Close to 80 percent of Singapore's 4 million citizens own personal computers and the island is largely considered to be the most technologically advanced in Southeast Asia. Hackers can be jailed for up to three years or fined up to S$10,000 (US$5,810) under the city-state's Computer Misuse Act. According to the report, the contest will last ______ days. A．one B．two C．four D．six

A、 BELL实验室 B、 麻省理工AI实验室 C、 AT&T实验室 D、 劳伦斯伯克利国家实验室

A．给机房安装防盗门和防盗窗 B．在机房周围安排保安巡逻 C．在机房前后墙壁都安装红外线防盗报警器 D．在计算机中安装防火墙

A．哈佛大学 B．麻省理工学院 C．剑桥大学 D．清华大学