Computer network system integration: English computer network system integration refers to the integration of scattered devices (such as personal computers), functions and information into interconnected, unified and coordinated systems through structured integrated wiring system and computer network technology, so that resources can be fully enjoyed and centralized, efficient and convenient management can be realized. System integration should adopt various integration technologies such as function integration, network integration and software interface integration. The key of system integration is to solve the interconnection problem between systems. It is a multi-vendor, multi-protocol and application-oriented architecture. This needs to solve various integration-oriented problems involving subsystems, building environment, construction cooperation, organization and management, staffing and so on, such as interfaces, protocols, system platforms, application software and so on. Network system integration refers to the erection and implementation of network information. Generally, it includes: 1, preliminary scheme 2, line and weak current construction 3, network equipment erection 4, various systems erection 5, network post-maintenance DNS is: DNS is a very important and commonly used system in TCP/IP architecture network (such as Internet) environment. The main function is to convert easy-to-remember domain names into hard-to-remember IP addresses. The network host executing the above DNS service can be called DNS server. Basically, we usually think that DNS only converts domain names into IP addresses, and then connects them with IP addresses (commonly known as "forward resolution"). In fact, the function of converting IP address into domain name is also commonly used. When the login is sent to a Unix workstation, the workstation will make a reverse query to find out where you connected from (often called "reverse analysis"). DNS server is used in TCP/IP network (such as general local area network or Internet). ). It locates computers and services by replacing IP addresses that are hard to remember (such as "61.186.250.41") with user-friendly names. Therefore, whenever you need to use a domain name such as "",you must first ensure that the name has been mapped to an IP address in the DNS server. The Dns server is a domain name management system-DNS (Domain Name System) refers to a domain name resolution server, and its function on the Internet is to convert domain names into ip addresses that can be recognized by the network. First of all, we should know that all Internet websites exist in the form of a server, but how do we get to the website server we want to visit? This requires assigning an IP address to each server. There are so many websites on the Internet that it is impossible for us to remember the IP address of each website. This gives birth to the domain name management system DNS, which can convert the easily remembered domain name we input into the IP address of the server we want to visit. For example, if we type in the browser, it will be automatically converted into 2002+004.2378.300304 DNS. How is the function realized? Let's have a simple study together. After you have your own domain name, you need a DNS server to resolve your domain name. The function of parsing is to tell your visitors which IP host your website is on. The DNS server is provided by your domain name registration company. If your domain name is registered in our company, it will be provided by our company. You don't need to make any settings, just keep the default options. You can change the settings of the domain name at any time, for example, you can point it to a different IP. When you change the domain name settings, DNS servers around the world will also be notified one by one. In this way, netizens all over the world will be guided to your new host one by one. There is a process of notification. If the DNS servers all over the world are refreshed, it will take about 24 hours to know your changes. DHCP stands for Dynamic Host Configuration Protocol. DHCP is an extension of BOOTP protocol, which allows diskless workstations to connect to the network and automatically obtain IP addresses. DHCP can provide IP address, subnet mask, default gateway, IP address of WINS server and IP address of DNS server for each network client. Using DHCP to allocate IP addresses in routers can refer to DHCP's dynamic host configuration protocol. DHCP is an extension of BOOTP protocol, which allows diskless workstations to connect to the network and automatically obtain IP addresses. DHCP can provide IP address, subnet mask, default gateway, IP address of WINS server and IP address of DNS server for each network client. 1. Campus network system integration Campus network system integration includes the configuration of network system equipment, server equipment and related equipment and all kinds of software. (1) Network system equipment Network system equipment includes: core switch, department switch, workgroup switch and related software and hardware systems. See Appendix 6 for specific requirements. The brands of core switches and departmental switches can be products of internationally renowned manufacturers such as Cisco, Foundry, Extreme, AVAYA, Cabletron and Alcatel. The brand of workgroup switch can be the products of well-known manufacturers at home and abroad, and all kinds of switches support three-layer switching. When all kinds of ports are equipped, port redundancy should be fully considered. All optical fiber ports include optical fiber modules and optical fiber jumpers suitable for optical fiber and transmission distance. Replace the original remote access server RAS 1500 and provide 64 dial-up lines. (2) Server equipment Server equipment includes: DNS server, WEB server, FTP server, BBS server, email server, user information management server, VOD server, comprehensive application server, special server for virus protection center, special server for intrusion detection, etc. Mail server, user information management server, etc. Can be equipped with minicomputers, and some are equipped with high-end PC servers or minicomputers. See Annex 7 for specific requirements. The brands of servers and minicomputers can be products of internationally renowned manufacturers such as IBM, SUN, HP, Fujitsu and SGI. (3) Campus network application system Campus network application system mainly includes system software, network management software and application software. * System software: included operating system and other related system software. * Network management software: network security management, policy management, billing management and other related management software. * Application software: video-on-demand system, network mail system, user management system and other related comprehensive application software. Among them, for VOD system, it is required to support multi-format, more than 500 streams, and have VOD management function. In addition, a video website is planned. (4) WLAN system The WLAN system of Nanjing University of Science and Technology is mainly implemented in multifunctional academic lecture halls and art museum lecture halls, and will be gradually expanded in the future. According to the specific area and requirements of the academic lecture hall, make a good plan, select products, equip with relevant equipment and corresponding software systems. And establish a base station, integrate, install and debug. Fully consider the security of WLAN, set up firewall, equip with safety management system, and consider the lightning protection design of wireless network. (5) Construction of postgraduate specialized network computer room The postgraduate specialized network computer room is an environment for all postgraduate students to conduct network teaching and application research, and also provides postgraduate students with network security intrusion detection and network equipment testing and research. Equipped with software and hardware system: 2 working group or department switches; Network test equipment and related software; 50 microcomputers; All kinds of system software and application software. (6) Network system integration is responsible for the overall network scheme design and network interconnection of the campus network according to users' needs, the selection, procurement and debugging of various network interconnection devices, servers and other devices, and the overall integration of various devices, and the corresponding network management systems are configured at the same time, including fault management, performance management, equipment management and security management, and billing management. In addition, there are 8 microcomputers for network center managers and system maintenance personnel, and 4 special notebook computers for network debugging and testing. Simple optical fiber testing tools 1 set are considered. (7) "Campus Network Expansion Project" should fully consider the safety management of dial-up users, digital campus construction, campus "one card" application system and other issues. 2. The network storage system provides streaming media services, user information management and comprehensive application services based on distance education and video on demand. Reasonably configure the network storage system to store relevant materials and educational information. Network storage system includes network storage (optical fiber storage) and optical switch. , its brand chooses the products of internationally renowned manufacturers. At present, it is equipped with 2T storage capacity, which can be extended to 4T. It requires dual controllers, stable performance and flexible application. See appendix 1 1 for specific requirements. 4.2.3 Campus network security system Campus network security system mainly includes firewall system, intrusion detection system and virus protection system of the whole campus network. (1) The firewall system mainly considers the protection of the campus network export to CHINAnet and the important servers inside the campus network. Firewall system has no brand restrictions and no user restrictions. (2) Intrusion detection system is to track and detect network exits and important servers, and establish an intrusion detection system and a vulnerability scanning system. (3) The overall virus protection system of the campus network is equipped with a network virus protection system according to the overall construction and function of the campus network. 4.2.4 High-performance computing of high-performance computer system mainly considers general scientific computing and parallel computing. According to the requirements of users, be responsible for the configuration and procurement of high-performance computers and network storage systems, as well as related computing software and development software systems; Responsible for the network interconnection and debugging of high-performance computers, equipped with related software systems, supporting related scientific calculation and parallel calculation to meet the needs of users. At the same time, the network security management of high-performance computers and the security and confidentiality of user operations are fully considered. The brands of high-performance computers can be the products of well-known manufacturers at home and abroad, such as IBM, SUN, HP, Fujitsu, SGI, etc. Please refer to appendix 10 for specific requirements. 4.2.5 Computer room renovation project The computer room renovation project includes the renovation and decoration of the network center computer room, high-performance computer room and related auxiliary computer rooms, as well as supporting facilities such as UPS power supply, air conditioning, grounding and lightning protection projects.