坐标 0756 ,202.86.128.86 仍返回正确结果,128.166 确实被污染
```
; <<>> DiG 9.16.26 <<>>
cloudflare.com @
202.96.128.86
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12145
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;
cloudflare.com. IN A
;; ANSWER SECTION:
cloudflare.com. 204 IN A 104.16.133.229
cloudflare.com. 204 IN A 104.16.132.229
;; Query time: 2 msec
;; SERVER: 202.96.128.86#53(202.96.128.86)
;; WHEN: Mon Aug 07 08:21:32 ;; MSG SIZE rcvd: 75
```
```
; <<>> DiG 9.16.26 <<>>
cloudflare.com @
202.96.128.166
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32398
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;
cloudflare.com. IN A
;; ANSWER SECTION:
cloudflare.com. 300 IN A 127.0.0.1
;; Query time: 5 msec
;; SERVER: 202.96.128.166#53(202.96.128.166)
;; WHEN: Mon Aug 07 08:21:07 ;; MSG SIZE rcvd: 48
```