网卡问题！

zt2620zt

昨天换了个新网卡，可以上网了，但是好像有点问题！
ping www.163.com
PING www.cache.split.netease.com (202.108.9.51) 56(84) bytes of data.
64 bytes from 202.108.9.51: icmp_seq=1 ttl=49 time=149 ms
64 bytes from 202.108.9.51: icmp_seq=2 ttl=49 time=148 ms
64 bytes from 202.108.9.51: icmp_seq=2 ttl=49 time=148 ms (DUP!)
64 bytes from 202.108.9.51: icmp_seq=3 ttl=49 time=154 ms
64 bytes from 202.108.9.51: icmp_seq=4 ttl=49 time=156 ms
64 bytes from 202.108.9.51: icmp_seq=4 ttl=49 time=156 ms (DUP!)
64 bytes from 202.108.9.51: icmp_seq=5 ttl=49 time=155 ms
64 bytes from 202.108.9.51: icmp_seq=5 ttl=49 time=156 ms (DUP!)
64 bytes from 202.108.9.51: icmp_seq=6 ttl=49 time=158 ms
64 bytes from 202.108.9.51: icmp_seq=6 ttl=49 time=158 ms (DUP!)

--- www.cache.split.netease.com ping statistics ---
6 packets transmitted, 6 received, +4 duplicates, 0% packet loss, time 5000ms
rtt min/avg/max/mdev = 148.276/154.342/158.845/3.865 ms
这是ping的结果，好像有重复的，这是怎么回事呀？怎么解决呀？