The two DNS of a router can be used together, but it is not a simple "1+1" relationship. In fact, the primary and secondary DNS work independently of each other in the router, and they are backed up to each other.
The primary DNS is used by the router first, and when the primary DNS fails or fails to work properly, the router will automatically switch to the standby DNS. This process is automatic and requires no human intervention. Therefore, users only need to set up the primary DNS and backup DNS and ensure their correctness, and you can use them with confidence.
Here's an example to illustrate why:Let's say the IP address of the router is 192168.0.1. The main DNS is 88.8.8, the standby DNS is 88.4.4。When the user types ** into the browser, the router first tries to use the primary DNS (8.).8.8.8) Perform parsing. If the primary DNS fails to resolve the **, the router automatically switches to the standby DNS (88.4.4) Perform parsing. If the alternate DNS is also unable to resolve the **, the browser will return an error message indicating that the user cannot access the **.
It is important to note that although the primary and secondary DNS are mutually backups, they are not simple backup relationships. In fact, they work independently of each other, and switching between them is automatic. Therefore, when using routers, users need to ensure the correctness of the primary DNS and standby DNS to ensure normal access to the network.
In addition, different router brands and models may have different setup methods, and users need to set the primary DNS and standby DNS according to their router model and brand. Generally speaking, the router setup method is relatively simple, and users can set it up through the router's settings page. When setting up, you need to pay attention to entering the correct IP address and port number and other information to ensure the normal operation of the router.
In short, the two DNS of the router can be used together, and they are backed up by each other. When using the network, you need to pay attention to setting the correct primary DNS and standby DNS to ensure normal network access. At the same time, users also need to pay attention to the daily maintenance and maintenance of the router to ensure the normal operation of the router.