DNS/watch/www.yahoo.comについて、ここに記述してください。
1. CNAME chain
$ dnsqr a www.yahoo.com
1 www.yahoo.com: 130 bytes, 1+5+0+0 records, response, noerror query: 1 www.yahoo.com answer: www.yahoo.com 300 CNAME fpfd.wa1.b.yahoo.com answer: fpfd.wa1.b.yahoo.com 300 CNAME fp.wg1.b.yahoo.com answer: fp.wg1.b.yahoo.com 60 CNAME any-fp.wa1.b.yahoo.com answer: any-fp.wa1.b.yahoo.com 60 A 98.137.149.56 answer: any-fp.wa1.b.yahoo.com 60 A 72.30.2.43
$ dnsq a www.yahoo.com a.gtld-servers.net
1 www.yahoo.com: 201 bytes, 1+0+5+5 records, response, noerror query: 1 www.yahoo.com authority: yahoo.com 172800 NS ns1.yahoo.com authority: yahoo.com 172800 NS ns5.yahoo.com authority: yahoo.com 172800 NS ns2.yahoo.com authority: yahoo.com 172800 NS ns3.yahoo.com authority: yahoo.com 172800 NS ns4.yahoo.com additional: ns1.yahoo.com 172800 A 68.180.131.16 additional: ns5.yahoo.com 172800 A 119.160.247.124 additional: ns2.yahoo.com 172800 A 68.142.255.16 additional: ns3.yahoo.com 172800 A 121.101.152.99 additional: ns4.yahoo.com 172800 A 68.142.196.63
$ dnsq a www.yahoo.com 68.180.131.16
1 www.yahoo.com: 124 bytes, 1+1+2+2 records, response, authoritative, noerror query: 1 www.yahoo.com answer: www.yahoo.com 300 CNAME fpfd.wa1.b.yahoo.com authority: wa1.b.yahoo.com 1209600 NS yf1.yahoo.com authority: wa1.b.yahoo.com 1209600 NS yf2.yahoo.com additional: yf1.yahoo.com 1800 A 68.142.254.15 additional: yf2.yahoo.com 1800 A 68.180.130.15
$ dnsq a fpfd.wa1.b.yahoo.com 68.142.254.15
1 fpfd.wa1.b.yahoo.com: 112 bytes, 1+4+0+0 records, response, authoritative, noerror query: 1 fpfd.wa1.b.yahoo.com answer: fpfd.wa1.b.yahoo.com 300 CNAME fp.wg1.b.yahoo.com answer: fp.wg1.b.yahoo.com 60 CNAME any-fp.wa1.b.yahoo.com answer: any-fp.wa1.b.yahoo.com 60 A 72.30.2.43 answer: any-fp.wa1.b.yahoo.com 60 A 98.137.149.56