一位客户说他们想在我们这里停放一个域名。从理论上讲，他们应该已经注册了该域。但是当我用 查找它时whois，我得到了这个：
jcastro@localhost:~$ whois notactuallythedomaininquestion.br
% Copyright (c) Nic.br
% The use of the data below is only permitted as described in
% full by the terms of use at https://registro.br/termo/en.html ,
% being prohibited its distribution, commercialization or
% reproduction, in particular, to use it for advertising or
% any similar purpose.
% 2017-11-07 09:26:29 (BRST -02:00)
% blocked_word: CG
% Security and mail abuse issues should also be addressed to
% cert.br, http://www.cert.br/ , respectivelly to [email protected]
% and [email protected]
%
% whois.registro.br accepts only direct match queries. Types
% of queries are: domain (.br), registrant (tax ID), ticket,
% provider, contact handle (ID), CIDR block, IP and ASN.
这是什么意思？一个真正不存在的域不会给我那条blocked_word线，而是给我：
jcastro@localhost:~$ whois randomwordsalad.br
.
.
.
% No match for randomwordsalad.br
.
.
.
两者之间的区别在于无法注册带有“阻塞字词”WHOIS 输出的名称，而带有“不匹配”的名称可以注册，尽管此时尚未注册。