这里(lǐ )需要(yào )说(shuō )明的(de )是(shì ),在我们系(xì )统里面如果单独设置(zhì )一个子域名解析,比如(rú )将主机名设置(zhì )为mail,单(dān )独解析到(dào )9,那么(me )该(gāi )解(jiě )析(xī )记录优先泛域(yù )名(míng )在(zài )实(shí )际(jì )使(shǐ )用中作用是(shì )非常广泛的(de ),比如实现无(wú )限二级域名功能,提供(gòng )免(miǎn )费的(de )url转发,在
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