Depends on the resolver configuration. E.g.: unbound has cache-min-ttl, a way to increase cache efficiency (and a mitigation for attacks such as rebinding). >

Depends on the resolver configuration. E.g.: unbound has cache-min-ttl, a way to increase cache efficiency (and a mitigation for attacks such as rebinding). > Time to live minimum for RRsets and messages in the cache. Default is 0. If the the minimum kicks in, the data is cached for longer than the domain owner intended, and thus less queries are made to look up the data. Zero makes sure the data in the cache is as the domain owner intended, higher values, especially more than an hour or so, can lead to trouble as the data in the cache does not match up with the actual data any more. Which is one of the reasons I think this is manly effective against home networks.