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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New"">The google.com replies without OPT when the query has OPT record. It seems to be true for all servers of google.com.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New"">https://www.zonemaster.net/result/396932f178c82fd6<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="p1"><span class="s1">; <<>> DiG 9.10.6 <<>> @216.239.34.10 google.com soa +dns +qr +mu</span><o:p></o:p></p>
<p class="p1"><span class="s1"><span lang="EN-US">; (1 server found)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; global options: +cmd</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; Sending:</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15863</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; flags: rd ad; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p2"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><b><span lang="EN-US">;; OPT PSEUDOSECTION:</span></b></span><b><span lang="EN-US"><o:p></o:p></span></b></p>
<p class="p1"><span class="s1"><b><span lang="EN-US">; EDNS: version: 0, flags: do; udp: 4096</span></b></span><b><span lang="EN-US"><o:p></o:p></span></b></p>
<p class="p1"><span class="s1"><b><span lang="EN-US">;; QUESTION SECTION:</span></b></span><b><span lang="EN-US"><o:p></o:p></span></b></p>
<p class="p1"><span class="s1"><b><span lang="EN-US">;google.com.</span></b></span><span class="apple-tab-span"><b><span lang="EN-US">
</span></b></span><span class="s1"><b><span lang="EN-US">IN SOA</span></b></span><b><span lang="EN-US"><o:p></o:p></span></b></p>
<p class="p2"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><b><span lang="EN-US">;; Got answer:</span></b></span><b><span lang="EN-US"><o:p></o:p></span></b></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15863</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 8</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; WARNING: recursion requested but not available</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p2"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; QUESTION SECTION:</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">IN SOA</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p2"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; ANSWER SECTION:</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">60 IN SOA ns1.google.com. dns-admin.google.com. (</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">223945713</span></span><span class="apple-converted-space"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">; serial</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">900</span></span><span class="apple-converted-space"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">; refresh (15 minutes)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">900</span></span><span class="apple-converted-space"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">; retry (15 minutes)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">1800 </span></span><span class="apple-converted-space"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">; expire (30 minutes)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">60 </span></span><span class="apple-converted-space"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">; minimum (1 minute)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p2"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; AUTHORITY SECTION:</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN NS ns3.google.com.</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN NS ns1.google.com.</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN NS ns4.google.com.</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN NS ns2.google.com.</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p2"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; ADDITIONAL SECTION:</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns3.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN A 216.239.36.10</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns3.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN AAAA 2001:4860:4802:36::a</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns1.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN A 216.239.32.10</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns1.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN AAAA 2001:4860:4802:32::a</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns4.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN A 216.239.38.10</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns4.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN AAAA 2001:4860:4802:38::a</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns2.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN A 216.239.34.10</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">ns2.google.com.</span></span><span class="apple-tab-span"><span lang="EN-US">
</span></span><span class="s1"><span lang="EN-US">345600 IN AAAA 2001:4860:4802:34::a</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p2"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; Query time: 52 msec</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; SERVER: 216.239.34.10#53(216.239.34.10)</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1"><span lang="EN-US">;; WHEN: Tue Dec 04 17:47:35 CET 2018</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="p1"><span class="s1">;; MSG SIZE</span><span class="apple-converted-space">
</span><span class="s1">rcvd: 322</span><o:p></o:p></p>
<p class="p2"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">---</span><span lang="EN-US" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Mats Dufberg</span><span lang="EN-US" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">DNS Specialist, IIS</span><span lang="EN-US" style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:black">Mobile: +46 73 065 3899</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:black"><a href="https://www.iis.se/en/"><span style="color:#954F72">https://www.iis.se/en/</span></a></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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