My domain controller is setup as the primary DNS server on all my client computers. I used to have a second domain controller setup as the alternate, but I recently removed that from my domain. Since then people have complained their "internet feels slow." I was under the impression I need to use my domain controller for DNS so my client computers can access our shared data drive. Is that true? Is there any reason only having 1 DNS server would not be enough for 25 clients? Would adding other alternates help? Thanks.