域名解析工具nslookup和dig对比

nslookup和dig默认都会输出所有解析地址，包括ipv4和ipv6。
dig -4和-6表示分别只用ipv4和ipv6来解析地址，nslookup不支持。

root@root1:~# nslookup -debug www.baidu.com
Server:         127.0.0.53
Address:        127.0.0.53#53------------QUESTIONS:www.baidu.com, type = A, class = INANSWERS:->  www.baidu.comcanonical name = www.a.shifen.com.ttl = 285->  www.a.shifen.cominternet address = 180.101.51.73ttl = 67->  www.a.shifen.cominternet address = 180.101.49.44ttl = 67AUTHORITY RECORDS:ADDITIONAL RECORDS:
------------
Non-authoritative answer:
www.baidu.com   canonical name = www.a.shifen.com.
Name:   www.a.shifen.com
Address: 180.101.51.73
Name:   www.a.shifen.com
Address: 180.101.49.44
------------QUESTIONS:www.a.shifen.com, type = AAAA, class = INANSWERS:->  www.a.shifen.comhas AAAA address 240e:e9:6002:1ac:0:ff:b07e:36c5ttl = 61->  www.a.shifen.comhas AAAA address 240e:e9:6002:1fd:0:ff:b0e1:fe69ttl = 61AUTHORITY RECORDS:ADDITIONAL RECORDS:
------------
Name:   www.a.shifen.com
Address: 240e:e9:6002:1ac:0:ff:b07e:36c5
Name:   www.a.shifen.com
Address: 240e:e9:6002:1fd:0:ff:b0e1:fe69root@root1:~# dig www.baidu.com; <<>> DiG 9.20.0-2ubuntu3.2-Ubuntu <<>> www.baidu.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8443
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 3;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;www.baidu.com.                 IN      A;; ANSWER SECTION:
www.baidu.com.          104     IN      CNAME   www.a.shifen.com.
www.a.shifen.com.       220     IN      A       180.101.49.44
www.a.shifen.com.       220     IN      A       180.101.51.73;; ADDITIONAL SECTION:
www.a.shifen.com.       104     IN      AAAA    240e:e9:6002:1fd:0:ff:b0e1:fe69
www.a.shifen.com.       104     IN      AAAA    240e:e9:6002:1ac:0:ff:b07e:36c5;; Query time: 1 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Sun Nov 30 09:25:35 UTC 2025
;; MSG SIZE  rcvd: 157