With the development of computer technology and network technology， network security issues， today has become one of the most attention to the problem of the network world Many factors， which endanger the safety of the network， they mainly attached to the various malware， including viruses and trojans is most general Internet users are familiar According to these harmful factors， network security technology rapid development， it also greatly improved the security of the Aiming at network security situation now， on the company's network information security are analyzed and put forward the improvement Keywords: physical security， intrusion detection， firewall， switch， router
