The operating system is Windows 11, and the following content is configured in the HOSTS file on the C drive: 192.168.10.10 www.simon.com 192.168.20.10 www.simon.com There are two private network servers providing website services, with server A's IP at 192.168.10.10 and server B's IP at 192.168.20.10. Then use Firefox to browse the website www.simon.com and set up Firefox's network.dnsCacheEntries、network.dnsCacheExpiration、network.dnsCacheExpirationGracePeriod Three configuration items are 0. When accessing normally, www.simon.com points to 192.168.10.10. When the 192.168.10.10 server fails, will it redirect to 192.168.20.10. What is the latency for switching domain names in Firefox? What is the mechanism for switching?