# File lib/Dnsruby/Resolver.rb, line 506
    def update_internal_res(res)
      [:port, :use_tcp, :no_tcp, :tsig, :ignore_truncation, :packet_timeout,
        :src_address, :src_port, :recurse,
        :udp_size, :dnssec].each do |param|

        res.send(param.to_s+"=", instance_variable_get("@"+param.to_s))
      end
    end