Ad
related to: online dns query example
Search results
Results From The WOW.Com Content Network
The number 172719 in the above example is the time to live value, which indicates the time of validity of the data. The any DNS query is a special meta query which is now deprecated. Since around 2019, most public DNS servers have stopped answering most DNS ANY queries usefully .
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. A recursive query is one for which the DNS server answers the query ...
nslookup operates in interactive or non-interactive mode. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt (>).
A wildcard DNS record is a record in a DNS zone that will match requests for non-existent domain names. A wildcard DNS record is specified by using a * as the leftmost label (part) of a domain name, e.g. *.example.com. The exact rules for when a wildcard will match are specified in RFC 1034, but the rules are neither intuitive nor clearly ...
For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google. If the A record for dns.google in turn pointed back to 8.8.4.4 then it would be said to be forward-confirmed.
Date/Time Thumbnail Dimensions User Comment; current: 00:09, 25 August 2017: 563 × 200 (61 KB): Mfwitten: The label "DNS Recurser" has been changed to "DNS Iterator"; the former implies that the resolver is performing a recursive search, but the diagram actually depicts an iterative search (besides the fact that diagram shows iteration, it is also the case...
DNS-SD is a mechanism for identifying services on the local network. [3] DNS-SD is typically used to present names of services (for example, printers or file servers) in user interfaces. DNS Long-Lived Queries (DNS-LLQ) can be used for DNS-SD to allow new services to appear automatically in an active user interface without requiring frequent ...
The DNS protocol specifies that when a client queries for a specific record type (e.g., TXT) for a certain domain name (e.g., example.com), all records of that type must be returned in the same DNS message. That may lead to large transactions with lots of "unnecessary" information being transferred and/or uncertainty about which TXT record to use.