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In view of the technical specifications of large and medium-sized Internet cafes, we used a tree (a special star structure) for switches when constructing the LAN of a direct store in "chinqing Network Home) topology of a set connection. The advantages of this topology are:

1. Small conflict domains: Each vswitch is split into one conflict domain. Internet cafes with hundreds of information points are split into several small conflict domains, so that CSMA/CD mechanisms can work smoothly.

2. Strong security: as long as the core layer switch works properly, the entire network can operate normally. If the access layer switch encounters a problem, it will only affect the information points in the corresponding region, instead of paralyzing the entire network. Faults in some regions will not affect the operation of the entire Internet cafe, minimizing the loss caused by the fault.

3. Easy maintenance: the tree structure is adopted, and network faults are first located on different exchange layers in layers, then, the faulty switch or node can be quickly located at the positioning level. This method simplifies the complicated maintenance problem.

4. good scalability: to expand the network scale, you only need to add a new switch on the corresponding layer with the expansion requirements, instead of changing the entire network topology, the real implementation of "business side, expansion side ".

The topology of the switch tree (a special star structure) and the description of each element:

1. Virtual border router (VBR): it carries the connection between the entire Intranet and the Internet, has multiple high-bandwidth ports, supports the ISDN remote access function, and enables administrators to perform remote control. Supports optical fiber access.

2. core layer switching equipment: the core layer features high bandwidth requirements, large packet forwarding capacity, exchange between multiple regions, and connection to various servers. Therefore, this layer is used for high-bandwidth, high-forwarding rate, and third-generation high-end switching devices.

3. access layer switch: the access layer switch is an exchange device that directly connects the user's machine and serves as a bridge between the core layer and the information point, therefore, this layer of switching equipment requires the use of stable, low-risk molding equipment, and achieve 100 [Please use civilized terms] port to the desktop principle.

4. Firewall: In today's increasingly complex network environment, installing a reliable and stable firewall is essential for a network environment. The firewall will shield external illegal intrusion and monitor various sessions to create a relatively secure network environment.

5. File Server: This server uses SERV-U, peanut shells, and other software to create FTP servers within the Internet cafe, facilitating users to upload and download files, it also plays a certain role in daily management and system updates of Internet cafes.

6. terminal nodes: PCs in Internet cafes. Based on Customer requirements, we reserve the notebook interface location.

7. IP Phone: using the Internet for telephone communication saves operation costs.

Key Technical Points in operation and maintenance:

If you want to make a network efficient, stable, and secure, management is an indispensable part. When a standardized and rigorous management system is formulated, we also provide technical solutions.