我想prdns还是被抢答

[liang-hiwin]

第一次查询www.google.com的ip结果为31.13.73.1 第二次查询www.google.com的ip结果为31.13.73.1 第三次查询www.google.com的ip结果为172.217.27.132 `root@iZwz9d1rjhrzzxa4lsoi93Z:~# dig www.google.com @127.0.0.1 -p 5400

; <<>> DiG 9.10.3-P4-Debian <<>> www.google.com @127.0.0.1 -p 5400 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23259 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION: ;www.google.com. IN A

;; ANSWER SECTION: www.google.com. 60 IN A 31.13.73.1

;; Query time: 32 msec ;; SERVER: 127.0.0.1#5400(127.0.0.1) ;; WHEN: Sun Apr 12 11:26:42 CST 2020 ;; MSG SIZE rcvd: 48

root@iZwz9d1rjhrzzxa4lsoi93Z:~# dig www.google.com @127.0.0.1 -p 5400

; <<>> DiG 9.10.3-P4-Debian <<>> www.google.com @127.0.0.1 -p 5400 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46933 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION: ;www.google.com. IN A

;; ANSWER SECTION: www.google.com. 60 IN A 31.13.73.1

;; Query time: 32 msec ;; SERVER: 127.0.0.1#5400(127.0.0.1) ;; WHEN: Sun Apr 12 11:26:53 CST 2020 ;; MSG SIZE rcvd: 48

root@iZwz9d1rjhrzzxa4lsoi93Z:~# dig www.google.com @127.0.0.1 -p 5400

; <<>> DiG 9.10.3-P4-Debian <<>> www.google.com @127.0.0.1 -p 5400 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57115 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION: ;www.google.com. IN A

;; ANSWER SECTION: www.google.com. 119 IN A 172.217.27.132

;; Query time: 35 msec ;; SERVER: 127.0.0.1#5400(127.0.0.1) ;; WHEN: Sun Apr 12 11:26:56 CST 2020 ;; MSG SIZE rcvd: 48 `