Your network is running three DNS servers, NS1, NS2, and NS3. NS1 is running Windows Server, whereas NS2 and NS3 are still running Windows NT 4.0. In reviewing the error log on NS1, you notice an error that lists NOTIMPL(4) being returned by NS3.What does this error indicate?
A. NS3 does not support extended DNS (EDNS0).
B. NS1 does not support extended DNS (EDNS0).
C. The OPT record received from NS3 contained an illegal Time-To-Live.
D. The OPT record needs to be added to all three name servers.
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