获取DNS服务器的版本信息

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dig @115.124.17.156 version.bind chaos txt

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; <<>> DiG 9.7.0-P2-RedHat-9.7.0-5.P2.el6 <<>> @115.124.17.156 version.bind chaos txt

; (1 server found)

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51568

;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; WARNING: recursion requested but not available

;; QUESTION SECTION:

;version.bind.CHTXT

;; ANSWER SECTION:

version.bind. 0 CH TXT "9.8.1"

;; AUTHORITY SECTION:

version.bind. 0 CH NS version.bind.

;; Query time: 1 msec

;; SERVER: 115.124.17.156#53(115.124.17.156)

;; WHEN: Tue Jun  3 11:39:24 2014

;; MSG SIZE  rcvd: 62

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option {

    #...

    version "I don‘t tell you my version.";

    #...

};