Authentication is an important part in the network security. It can prevent illegal user from accessing network.
身份认证是网络安全技术的一个重要组成部分，它限制非法用户访问网络资源。
However, since DHCP itself hasn't the ability to control access, illegal user can easily fabricate the IP address.
然而，DHCP由于本身不具有访问控制能力，极易造成IP地址盗用。
However, since DHCP itself hasn't the ability to control access, illegal user can easily fabricate the IP address.
然而，DHCP由于本身不具有访问控制能力，极易造成IP地址盗用。
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