Is cf-serverd necessary?

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http://serverfault.com – Since a cfengine client can run autonomously based upon the files in its 'inputs' directory, why is it necessary to have a policy server running cf-serverd? Would some other file distribution mechanism (NFS, pull from source control, transfer from dumb file server) work just as well? Are there other things that the Community Edition that the policy server can do other than provide files? (HowTos)