题目内容

以下关于接人服务的描述中,哪个是错误的?——

A. 我国信息产业部界定接入服务是属于“电信业务的第二类增值电信业务”
B. Intemet接人服务是指利用接入服务器和相应的软硬件资源建立业务结点,并利用公用电信基础设施将业务结点与Internet骨干网相连接。用户可以利用公用电话网或其他接人手段连接到业务结点,并通过该节点接人Intemet
C. Intemet接入服务业务主要有两种应用:一是为Intemet信息服务业务(ICP)经营者提供Internet接入服务;二是为普通上网用户提供Intemet接人服务
D. 从网络层次的角度来看,接入网不是属于物理层的问题

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