这(zhè )里需(xū )要说(shuō )明的是(shì ),在我们系统(tǒng )里面(miàn )如果(guǒ )单(dān )独设(shè )置一个子域(yù )名解(jiě )析,比如(rú )将主机名设置为mail,单独(dú )解析到9,那(nà )么该解(jiě )析记录(lù )优先泛域(yù )名在实际(jì )使用(yòng )中(zhōng )作用(yòng )是(shì )非常广(guǎng )泛的,比如实现无限(xiàn )二级域(yù )名功能,提供免费的url转发,在
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