Application analysis of static routing technology
Below we mainly analyze the practical application of static routing technology. When a host application needs to send a data packet to a destination located on a different network, the router receives data information from an interface. The network layer will check this packet to determine the network that is expected to be sent. Then, the router will check its routing table and use the information in the routing table to determine the port to be sent. The router again encapsulates the datagram according to certain rules, and then forwards the data packet on a certain port. This process of routing judgment occurs when the router forwards any packet. The route judgment enables the router to select the most suitable interface to forward the data packet. That is to say, the router mainly works on the routing table. If there is no routing table or the information in the routing table is wrong, the router will be like the same pile of scrap metal and has no value. Depending on the routing table generation mechanism, it can be divided into For static routing technology and dynamic routing. Dynamic routing means that the router will automatically update the routing table according to certain methods. Because in the network, when adding a router or a link fails, some information will be generated on the network to inform the other party. The router updates its own routing table based on this information, and adjusts the related routing information according to some predetermined rules. It can be seen that the use of dynamic routing can facilitate our management. However, it also brings some problems. For example, static routing technology will search all visible routes in the network, that is to say, if the dynamic routing of the router is used, as long as there is no problem with the data link, in general, each network is reachable. Not conducive to network administrators to control network access. Static routing is to manually update the routing table by the network administrator. When the network topology changes or routers increase and decrease, etc., the network administrator needs to manually update the router's routing table, otherwise, network communication will have an impact. However, compared with dynamic routing, the biggest disadvantage is that the network administrator needs to manually update the routing table, regardless of any changes in the enterprise's network. This is a very heavy workload for network administrators. However, static routing also has its advantages. For example, on the one hand, it is not necessary to enable the dynamic routing protocol service, so it can reduce the operating resource overhead of the router. Moreover, in the network, there is no need to send and transfer information, which can reduce the bandwidth consumption caused thereby. To achieve dynamic routing, there must be some protocol support, such as RIP and so on. These protocols specify the rules for generating routing tables in routers. Running these protocols, after all, will occupy router resources. At the same time, these protocols will often communicate with neighboring routers to determine whether the other party's operating status is normal. Undoubtedly, this will increase the burden on routers and enterprise network bandwidth. However, this advantage is not the main reason why we use static routing. With the transformation and upgrading of enterprise networks, these router resources or network bandwidth restrictions are no longer a bottleneck resource in the process of enterprise network formation. It was another feature that decided to let us use static routing technology. Network administrators can use static routing technology to control access to the network. For example, the company where the author is located is a large group company, and the group headquarters and the following three subsidiaries use the same network. Now when the network is formed, leaders hope that the networks of various subsidiaries and group companies can be independent of each other and work without interference. Of course, there are many ways to achieve this requirement. For example, you can apply for an independent online account for each subsidiary. However, this method is a bit wasteful because the group company already has a fiber-optic network. If other companies open the network without taking the group's line, it will need to pay a lot of extra money, and the speed may not be as fast as the fiber network, so it is not very realistic. Furthermore, if the reason is that the access control list of the CISCO router can also achieve related control. However, this requires static routing technology to support this function, and there are certain methods for configuration, and maintenance is not very important. Therefore, according to the author's understanding, although the access control list is a very good network access control mechanism, in practical applications, fewer companies are used, because its configuration is still difficult. Die-Casting Products,Led Housing Die Casting,Aluminum Die Casting Product,Aluminum Die Casting Led Yangzhou Huadong Can Illuminations Mould Manufactory Co., Ltd. , https://www.light-reflectors.com