Melissa and LoveLetter made use of the trust that exists between friends or colleagues.Imagine receiving an （） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （） . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages （） . As administrators seek to block dangerous email attachments through the recognition of well-known （） , 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 （） access to your network.

simultaneously runs commands in the background to steal your passwords and give the（）access to your network.

A．cracker

B．user

C．customer

D．client

12315网络建设中，错误的是（）

A.省局发挥的作用中包括负责指挥调度和处理系统、以食品为重点的商品安全信息监控、商品质量监测

B.12315接入系统由各地工商局自行建设，各区县不再建设12315接入中心，已建设的区县要整合到市级受理平台中

C.省局与省电信公司达成了依托114号码百事通平台资源开展组建12315受理平台的总体框架协议

D.12315接入系统的用户权限可以采用12315业务综合管理平台的权限管理方式，但不可以单独自建用户权限