Local System
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... hosts that use the domain system. These master
files are updated by local system administrators. Master files are text
files that are read by a local name server ...
...
Each host's name servers and resolvers are configured by a local system
administrator [RFC-1033]. For a ...
... is free to refuse to perform recursive
services for any or all clients. The user should consult the local
system administrator to find name servers willing to perform the
service.
...