The thesis brings forward the relevant solution of the network and the Internet security of Zhejiang Radio & Television Group giving elaboration on the two aspects. First of all, it explains and analyzes the related technique of the network and the Internet security will possibly be used in this project. Then, it studies and researches the computer network and security used in group. Thirdly, on the basis of ZRTG network it sets out the concrete demanding analysis. At the end of the thesis, it states the detailed design project on Internet and the facts of Internet security of ZRTG. The project is helpful to improve the reliability of network and the safety of Internet.
KEYWORDS：network system，data security, network security，LAN
