这里需(xū )要说明的是,在我(wǒ )们系统里面如果(guǒ )单独设置(zhì )一个子(zǐ )域(yù )名解(jiě )析(xī ),比如(rú )将主机(jī )名设置为mail,单独解析到9,那么(me )该(gāi )解析记(jì )录(lù )优(yōu )先泛域(yù )名在(zài )实际使(shǐ )用中作用是非常(cháng )广泛的,比如实现(xiàn )无限(xiàn )二级域(yù )名(míng )功能,提(tí )供免(miǎn )费的(de )url转(zhuǎn )发(fā ),在
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