supermaster.com mail is handled by 5 mail.supermaster.com.

    D.//查询整个域的信息
#host -l supermaster.com. 192.168.0.111

Using domain server:
Name: 192.168.0.111
Address: 192.168.0.111#53
Aliases:

supermaster.com SOA www.supermaster.com. master.supermaster.com. 2 28800 7200 604800 86400
supermaster.com name server www.supermaster.com.
supermaster.com mail is handled by 5 mail.supermaster.com.
ftp.supermaster.com has address 192.168.0.111
mail.supermaster.com has address 192.168.0.111
ssl.supermaster.com has address 192.168.0.111
www.supermaster.com has address 192.168.0.111
supermaster.com SOA www.supermaster.com. master.supermaster.com. 2 28800 7200 604800 86400
    
   E.//列出与一个主机名相关的资源记录的详细信息
#host -a www.supermaster.com

Trying "www.supermaster.com"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30624
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.supermaster.com.  IN ANY

;; ANSWER SECTION:
www.supermaster.com. 86400 IN A 192.168.0.111

;; AUTHORITY SECTION:
supermaster.com. 86400 IN NS www.supermaster.com.

Received 67 bytes from 192.168.0.111#53 in 1 ms

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