The Design And Implementation Of Network Scheme For Chemical Enterprise

With the development of the chemical enterprise and the advance of the enterpriseinformation, the enterprise is increasingly dependent on the network. A variety of datatransmitted in the enterprise network, such as enterprise information and datacommunication, paperless office application, the application of corporate finance etc. TheTransmission quality and information security become more and more important. Whetherthe enterprise network can guarantee the general work, can protect the OA telecommuting,can protect the general operation of the decision support management platform, can protectthe corporate network security, has become an unavoidable problem. It is necessary to builda safe, reliable and high performance information highway. The enterprise network hasbecome the cornerstone of the success of the enterprise information construction.At the same time, the security of the enterprise network is important. In this paper,packets filtering, port setting, VLAN and other means are used to guarantee networksecurity. Packet filtering can check that all incoming and outgoing packets. This control canprevent packets which do not compare with the established rules. Packet capturing basedpersonal firewall plays a good effect in protecting network. It can significantly reduce therisk of computer invasion. The firewall packet capture has great practical significance.Using the star and bus type hybrid network topology also brings great convenience forenterprises. Chemical company’s network construction is conducive to improve thereal-time and security information transmission.The contents of the thesis include: requirements analysis, according to the specificneeds of chemical companies design the network topology and combined with the actualoperation scene of nationwide branch design a number of tasks and case scenarios;investigation and analysis, understand the daily management tasks and the scope of thechemical enterprise system administrator, set the corresponding administrative privileges toimprove network security; find specific access requirements and security needs to designappropriate access rules and filtering; according to the requirements of the chemicalenterprise management the network security mechanisms should be established in the process of building enterprise networks, and publish the network security managementprovisions, to make the management of the network more efficiently. For some of theabnormal and common situation in the process of building there should be some optionalprograms and provision, such as Sensitive data confidentiality, remote OA and ERP systemrunning. The design and implementation of the chemical enterprise network follow thoserequirements as above. The backbone connects the host computer room, air separationroom, purification room and warehouse three sub computer rooms. It composes the maintrunk of the enterprise network systems which provides high-speed channel for theexchange of information. The trunk uses10Gigabit Ethernet, subnets use Gigabit Ethernet,and network protocols use TCP/IP protocol. The network can support video, data andvoice application. Switches should be the mainstream, mature, reputation and wellafter-sales service products, core switches use three layer switches, the sub switches usetwo layer switches, both of them must support VLAN and could be used to solve thereal-time response with the unexpected increase of data and intensive services. Theinformation includes data, voice and image; therefore have to consider the real-time videomessaging, real-time monitoring and real-time requirements in particular. UPS powerequipment in the host room of office building prevent the host housing and financial sectorsin unnecessary losses due to temporary power failure, and ensure servers, switches, routers,hubs, and other equipment running well. Lenovo smart firewall unified allocates thenetwork bandwidth using the principle of distribution according to the division of VLAN.This makes full use of network bandwidth and improves the operating efficiency of thenetwork. Enterprise data is stored centrally, centralized management of enterprise data, dataeffectively sharing of enterprise data, enterprise data storage space to share, effectiveunified security backup for the overall data can be maintained in the form of the remotecontrol host. According to the requirements of the enterprise to achieve unattended for veryimportant data in the enterprise automatically implement backup strategies, enterprise datawarehouse building for the future development of the enterprise, in order to fullycentralized management of the enterprise, in order to lay a foundation.