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[public-dns-discuss] Unable use 8.8.8.8 to parse A record for www.epd.gov.hk



Unable use 8.8.8.8  to parse A record for www.epd.gov.hk  
but Sometimes you can parse

The test results are as follows:

$ dig  www.epd.gov.hk @8.8.8.8

; <<>> DiG 9.9.4-RedHat-9.9.4-74.el7_6.1 <<>> www.epd.gov.hk @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 50360
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.epd.gov.hk. IN A

;; AUTHORITY SECTION:
epd.gov.hk. 313 IN SOA ns1.hk.net. hostmaster.citictel-cpc.com. 2019111601 10800 3600 604800 600

;; Query time: 91 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Nov 18 10:37:50 CST 2019
;; MSG SIZE  rcvd: 116


 dig  www.epd.gov.hk @4.2.2.1

; <<>> DiG 9.9.4-RedHat-9.9.4-74.el7_6.1 <<>> www.epd.gov.hk @4.2.2.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45728
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 8192
;; QUESTION SECTION:
;www.epd.gov.hk. IN A

;; ANSWER SECTION:
www.epd.gov.hk. 600 IN CNAME cdn-www.epd.wh.cis.gov.hk.
cdn-www.epd.wh.cis.gov.hk. 300 IN CNAME d1p1u7lx7ri3uq.cloudfront.net.
d1p1u7lx7ri3uq.cloudfront.net. 60 IN A 13.35.253.38
d1p1u7lx7ri3uq.cloudfront.net. 60 IN A 13.35.253.87
d1p1u7lx7ri3uq.cloudfront.net. 60 IN A 13.35.253.105
d1p1u7lx7ri3uq.cloudfront.net. 60 IN A 13.35.253.83

;; Query time: 716 msec
;; SERVER: 4.2.2.1#53(4.2.2.1)
;; WHEN: Mon Nov 18 10:40:08 CST 2019
;; MSG SIZE  rcvd: 183



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