You are using adu and are authenticated and associated to an access point. you are unable to obtain an ip address. Which of the following will cause this problem？（） ["aes encryption enabled","tkip enabled","third-party wireless supplicant enabled","802.1x authentication type enabled"]
下列各项中，对小型企业内部控制特点的说法中不正确的是（）。 ["小型企业可能使用非正式和简单的程序和方法实现内部控制目标","小型企业的控制环境可能与大型企业不同","小型企业可能没有正式的风险评估过程","小型企业业务报告相关的信息系统和相关业务流程较大型企业更为复杂"]
Which two series of routers can integrate security services， enable wireless networking， and simplify network management？ （） [" Cisco 830 Series routers"," Cisco 850 Series routers"," Cisco 1700 Series Modular Access Routers"," Cisco 3800 Series Integrated Services Router"]
实现冷排胶印技术改造后，报纸印刷厂的生产过程变为（） ["“印”.“刷”并重","以“印”为主","“印”.“刷”合一","以“刷”为主"]
银行产品的生命周期有四个阶段：（）、成长阶段、（）衰退阶段。
试述人机系统评价的要点.
