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In MAC OS X (Mavericks) i see multiple resolvers and i dont understand the difference between scoped and non-scoped dns query resolver as displayed below.

$ scutil --dns
DNS configuration

resolver #1
  search domain[1] : test
  nameserver[0] :
  flags    : Request A records
  reach    : Reachable

....  ...
resolver #6
  domain   : 9.e.f.ip6.arpa
  options  : mdns
  timeout  : 5
  flags    : Request A records
  order    : 300600

DNS configuration (for scoped queries) 

resolver #1
  search domain[0] : test
  nameserver[0] :
  if_index : 4 (en0)
  flags    : Scoped, Request A records
  reach    : Reachable
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