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问题：
[单选题]下面关于认证技术说法正确的是____。
A、认证技术可以识别所访问的IP地址是否合法
B、DNA认证是目前计算机身份认证方式中最常用的认证方式
C、账户名和口令认证方式是计算机身份认证技术中最常用的认证方式
D、信息认证必须有专门的硬件支持才可以实现
参考答案：
C
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