1.1 Wide Area Network end

The wide area network end is the line connecting the router to an external network operator. Wan lines are also the main path for broadband access. Therefore, if a line is dropped or congested, the broadband access of enterprises will be interrupted! This situation will cause great problems for some enterprises. Therefore, the primary consideration of wide area network security is how to ensure the stability of the line and maintain the operation of enterprises in various circumstances.
Most small and medium-sized enterprises use single-line ADSL because they have a small number of internet users or have limited funds. For example, enterprises in the service industry or foreign trade industry may require a large amount of bandwidth or require a high network bandwidth. Based on the user experience supported by Qno, Qno is more inclined to use multi-Wan line configuration in the following situations:
• When a large number of uploads/downloads are required:
As a result of informatization, many enterprises need to perform a large number of download operations from time to time. For example, a mineral trading company in Chengdu needs to upload sales reports and inventory data every day after work, which takes a lot of time. For example, a private enterprise located in Ningbo always needs to download the design surface from the server of a foreign customer for production. When downloading, the network management system generally does not want to be affected by the Internet access or downloading of general users. Therefore, you can apply for two lines: Generally, both lines are open for Internet use; however, when special work is required, it can be controlled to retain specific lines for a large number of download tasks to ensure that important data can be transmitted on time. After the multi-Wan configuration is adopted, the network administrator can work overtime in the office to wait for data transmission, which can be greatly reduced!
• Cross-network problems:
When I first arrived in Jinan, Shandong province, a user said that their company was a trading company of agricultural products and often needed to establish a VPN connection with the headquarters in Beijing, but I don't know why, online is always unstable, data is often not transmitted, and you have to re-connect. This situation may be caused by the instability caused by the establishment of VPN networks across different carriers. For example, the Headquarters uses the lines of China Netcom, while the branches use the lines of China Telecom, resulting in insufficient cross-network bandwidth, and the phenomenon. In this case, you can also use a multi-WAN router to solve the problem. That is, the Headquarters can access the lines of China Netcom and China Telecom at the same time, and the external points of the China Netcom line establish a VPN from the entrance of China Netcom, the outer point of China Telecom is a VPN built from the telecom line, which can solve the small or unstable cross-network bandwidth.
• When backup is required:
Another advantage of Multi-Wan lines is the provision of backup. A common situation is that some regional operators will add ADSL lines to optical fiber users. In this case, ADSL can be used with optical fiber for backup. In the case of a fault in the former, ADSL will be used first. Some users want to use lines of different carriers. In this way, the line of carrier B can be replaced when A problem occurs in the line or data center of carrier. For some industries, such as the media industry, you need to be able to access the Internet at any time. This function is very required.
• When AD bandwidth is insufficient:
Most enterprises use ADSL. According to statistics, most broadband users in small and medium-sized enterprises use ADSL for Internet access. However, in some regions, the relative bandwidth of ADSL is relatively small. For example, the 64 K/64 K line is obviously insufficient for enterprise applications, but the application for optical fiber is more expensive than several ADSL lines, in this case, using a multi-WAN router to aggregate multiple ADSL lines is a feasible and cost-effective method.
The wide area network is the only route for enterprises to access the Internet, so it is crucial for enterprises to access the Internet. According to a market survey conducted by Qno xiaonuo, many enterprises are interested in wireless broadband access, such as 3G or WiMax. They hope to use wireless access as an aid for wired access, this more or less represents the importance and expectations of enterprises for wide-area network access.

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