What happened after you input the url in the browser?
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when you are typing, browser starts checking history, bookmark to find possible matches.
give you intelligent auto-complete
some browser like chrome will even load pages from cache
browser will first check local hosts file whether it has the rules of this domain. If yes, directly use ip address from local hosts file;
a DNS resolver queries a DNS server that provides a record either for which the server is authoritative, or it provides a partial result without querying other servers.
In a recursive query, a DNS resolver queries a single DNS server, which may in turn query other DNS servers on behalf of the requester. For example, a simple stub resolver running on a home router typically makes a recursive query to the DNS server run by the user's ISP.
