Hello,
Non-authoritative response is a domain name resolution response obtained from a non-physical record store DNS Server. DNS request timed out. timeout was 2 seconds. Timeout was 2 seconds. The DNS server is essentially the first server to access the DNS root server (of which there are 13 locations worldwide) to initiate a query. The exception is your own DNS zone, but if you add a DNS suffix, you are not directly indicating your own DNS zone, so you must access the DNS root, which can happen if communication with the outside is blocked.
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Zunhui