某天，公司有一台电脑感染“勒索”病毒，网络管理员应采取（1）、（2）、（3）措施。（1）~（3）备选答案：A.断开已感染主机的网络连接B.更改被感染文件的扩展名C.为其他电脑升级系统漏洞补丁D.网络层禁止 135/137/139/445 端口的 TCP 连接E.删除已感染病毒的文件
正确答案及解析
正确答案
解析
（1）~（3）A、C、D
合适的做法包括A、C、D
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