这(zhè )里(lǐ )需要(yào )说(shuō )明的是(shì ),在我们系(xì )统(tǒng )里面如果(guǒ )单独设置一(yī )个(gè )子域(yù )名解析,比如将(jiāng )主机(jī )名设置(zhì )为mail,单独解(jiě )析到(dào )9,那么(me )该解析记录(lù )优(yōu )先泛域名(míng )在实际使用(yòng )中作用(yòng )是(shì )非常(cháng )广泛的,比如实(shí )现无(wú )限二级域名功能,提(tí )供免费的url转发,在
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