What is the function of "Private DN...
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What is the function of "Private DNS Mode"? --Why Android is not heard anymore
A character string such as "news.mynavi.jp" that is casually used when directly accessing a website on the Internet. It certainly means an address, but it doesn't actually connect to the website with this string.
Smartphones and personal computers communicate based on the convention (protocol) of "TCP / IP". In TCP / IP, both communicating parties use a 32-bit numerical value (in the case of IPv4) called "IP address" as a marker, so communication cannot be performed as it is.
Therefore, what is needed is a name resolution mechanism called "DNS (Domain Name System)". Access is possible by inquiring the domain name part ("news.mynavi.jp" in this example) included in the address to the "DNS server" and having it converted to the "IP address" which is the real address of the WEB server. I am doing it.
This DNS server uses the one specified by the carrier for mobile lines. In the case of Wi-Fi, it can be specified on the smartphone / PC side, but unless the setting is changed, the one specified on the router / Wi-Fi access point side (generally using the DNS server of the contracted provider) )Use the.
"Private DNS mode" added in Android 9 (Pie) is a function that makes it possible to use any DNS server even on mobile lines. If you specify a high-speed DNS server such as "Google Public DNS" (IP address is "8.8.8.8") or "1.1.1.1 for Families" (IP address is "1.1.1.1"), it will take time to resolve the name. May be shortened to some extent.
Setting is easy, open the screen in the order of "Settings" → "Network and Internet" → "Detailed settings" → "Private DNS" on Android 9 or later terminals (it differs slightly depending on the terminal), and enter the IP address of the DNS server You can save it. Why not try it with "8.8.8.8" or "1.1.1.1" mentioned above?
