大型网站一般都会有多台主机，比如新浪网，通过 NSLOOKUP 就可以看出，它指向了多个IP。Z:\>nslookup www.sina.com.cn Server: c.center-dns.jsinfo.net Address: 61.177.7.1 Name: newsnj.sina.com.cn Addresses: 202.102.75.169, 202.102.75.170, 202.102.75.161, 202.102.75.162 202.102.75.163, 202.
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