As a novel computing platform in network, IoT will bring many security challenges to enterprise networks, and create new opportunities for security industry. This talk will provide a general overview of enterprise network security problems, especially the data security, caused by IoT. After that, a few existing security technologies are evaluated as necessary elements of a holistic network security that cover IoT devices. These technologies include : (a) IoT security monitoring and control; (b) FOTA for firmware vulnerability management; (c) NetFlow based big data security analysis. In the end, the practice of standard security protocols (such as OpenIoC and IODEF) will be strongly advocated for delivering effective IoT security solutions.