助教您好：
系馆旧馆一楼的无线网络最近非常不稳定。昨天在演讲厅R103右前方座位使用，
CSIE完全连线不上，而NTU封包都快要回不来，一直timeout。今天在R111使用网络
CSIE倒是还可以用，但是NTU还是一样，详细的PING LOG:
看起来都卡在某个节点，突然一口气送出来（发射器与笔电？）
PING 140.112.30.28 (140.112.30.28): 56 data bytes
64 bytes from 140.112.30.28: icmp_seq=0 ttl=59 time=81.941 ms
64 bytes from 140.112.30.28: icmp_seq=1 ttl=59 time=463.437 ms
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6
Request timeout for icmp_seq 7
Request timeout for icmp_seq 8
Request timeout for icmp_seq 9
Request timeout for icmp_seq 10
Request timeout for icmp_seq 11
64 bytes from 140.112.30.28: icmp_seq=3 ttl=59 time=9497.619 ms
64 bytes from 140.112.30.28: icmp_seq=4 ttl=59 time=8497.514 ms
64 bytes from 140.112.30.28: icmp_seq=5 ttl=59 time=7497.509 ms
64 bytes from 140.112.30.28: icmp_seq=6 ttl=59 time=6504.943 ms
64 bytes from 140.112.30.28: icmp_seq=7 ttl=59 time=5504.682 ms
64 bytes from 140.112.30.28: icmp_seq=9 ttl=59 time=3776.782 ms
64 bytes from 140.112.30.28: icmp_seq=10 ttl=59 time=2776.561 ms
64 bytes from 140.112.30.28: icmp_seq=11 ttl=59 time=1776.345 ms
64 bytes from 140.112.30.28: icmp_seq=12 ttl=59 time=776.109 ms
^C