[root@root ~]# ping mirrors.njupt.edu.cn
PING mirrors.njupt.edu.cn (180.209.95.109) 56(84) bytes of data.
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=1 ttl=36 time=43.8 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=2 ttl=36 time=43.3 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=3 ttl=36 time=43.3 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=4 ttl=36 time=43.5 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=5 ttl=36 time=43.3 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=6 ttl=36 time=43.4 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=7 ttl=36 time=43.3 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=8 ttl=36 time=46.8 ms
64 bytes from 180.209.95.109 (180.209.95.109): icmp_seq=9 ttl=36 time=43.8 ms