为什么 github 丢包这么多

C:\Users\v2ex>ping github.com

正在 Ping github.com [192.30.252.128] 具有 32 字节的数据:
来自 192.30.252.128 的回复: 字节=32 时间=332ms TTL=50
来自 192.30.252.128 的回复: 字节=32 时间=337ms TTL=50
来自 192.30.252.128 的回复: 字节=32 时间=329ms TTL=50
来自 192.30.252.128 的回复: 字节=32 时间=285ms TTL=50

192.30.252.128 的 Ping 统计信息:
数据包: 已发送 = 4，已接收 = 4，丢失 = 0 (0% 丢失)，
往返行程的估计时间(以毫秒为单位):
最短 = 285ms，最长 = 337ms，平均 = 320ms

itfanr-MacBook-Pro:~ itfanr$ ping github.com
PING github.com (192.30.252.129): 56 data bytes
Request timeout for icmp_seq 0
64 bytes from 192.30.252.129: icmp_seq=1 ttl=50 time=689.174 ms
Request timeout for icmp_seq 2
64 bytes from 192.30.252.129: icmp_seq=3 ttl=50 time=424.815 ms
64 bytes from 192.30.252.129: icmp_seq=4 ttl=50 time=342.095 ms
64 bytes from 192.30.252.129: icmp_seq=5 ttl=50 time=328.162 ms
64 bytes from 192.30.252.129: icmp_seq=6 ttl=50 time=372.025 ms
Request timeout for icmp_seq 7
64 bytes from 192.30.252.129: icmp_seq=8 ttl=50 time=469.734 ms
64 bytes from 192.30.252.129: icmp_seq=9 ttl=50 time=338.726 ms
64 bytes from 192.30.252.129: icmp_seq=10 ttl=50 time=468.616 ms
64 bytes from 192.30.252.129: icmp_seq=11 ttl=50 time=376.118 ms
Request timeout for icmp_seq 12
64 bytes from 192.30.252.129: icmp_seq=13 ttl=50 time=416.593 ms
64 bytes from 192.30.252.129: icmp_seq=14 ttl=50 time=445.207 ms
^C
--- github.com ping statistics ---
15 packets transmitted, 11 packets received, 26.7% packet loss
round-trip min/avg/max/stddev = 328.162/424.660/689.174/96.794 ms

$ ping github.com
PING github.com (192.30.252.129) 56(84) bytes of data.
64 bytes from github.com (192.30.252.129): icmp_req=1 ttl=43 time=323 ms
64 bytes from github.com (192.30.252.129): icmp_req=2 ttl=43 time=322 ms
64 bytes from github.com (192.30.252.129): icmp_req=3 ttl=43 time=324 ms
64 bytes from github.com (192.30.252.129): icmp_req=4 ttl=43 time=324 ms
64 bytes from github.com (192.30.252.129): icmp_req=5 ttl=43 time=321 ms
64 bytes from github.com (192.30.252.129): icmp_req=6 ttl=43 time=322 ms
64 bytes from github.com (192.30.252.129): icmp_req=7 ttl=43 time=334 ms
64 bytes from github.com (192.30.252.129): icmp_req=10 ttl=43 time=324 ms
64 bytes from github.com (192.30.252.129): icmp_req=11 ttl=43 time=338 ms
64 bytes from github.com (192.30.252.129): icmp_req=12 ttl=43 time=356 ms
64 bytes from github.com (192.30.252.129): icmp_req=13 ttl=43 time=361 ms
64 bytes from github.com (192.30.252.129): icmp_req=14 ttl=43 time=387 ms
64 bytes from github.com (192.30.252.129): icmp_req=15 ttl=43 time=397 ms
64 bytes from github.com (192.30.252.129): icmp_req=16 ttl=43 time=401 ms
64 bytes from github.com (192.30.252.129): icmp_req=17 ttl=43 time=359 ms
64 bytes from github.com (192.30.252.129): icmp_req=18 ttl=43 time=325 ms
64 bytes from github.com (192.30.252.129): icmp_req=19 ttl=43 time=324 ms
^C
--- github.com ping statistics ---
19 packets transmitted, 17 received, 10% packet loss, time 18015ms
rtt min/avg/max/mdev = 321.957/344.154/401.561/27.280 ms

叫你用电信。傻了吧，电信就是要一切都用代理才行。

$ ping github.com
PING github.com (192.30.252.129) 56(84) bytes of data.
64 bytes from github.com (192.30.252.129): icmp_seq=1 ttl=46 time=414 ms
64 bytes from github.com (192.30.252.129): icmp_seq=2 ttl=46 time=532 ms
64 bytes from github.com (192.30.252.129): icmp_seq=3 ttl=46 time=330 ms
64 bytes from github.com (192.30.252.129): icmp_seq=4 ttl=46 time=448 ms
64 bytes from github.com (192.30.252.129): icmp_seq=5 ttl=46 time=406 ms
64 bytes from github.com (192.30.252.129): icmp_seq=6 ttl=46 time=364 ms
64 bytes from github.com (192.30.252.129): icmp_seq=7 ttl=46 time=323 ms
64 bytes from github.com (192.30.252.129): icmp_seq=8 ttl=46 time=441 ms
64 bytes from github.com (192.30.252.129): icmp_seq=9 ttl=46 time=413 ms
64 bytes from github.com (192.30.252.129): icmp_seq=10 ttl=46 time=372 ms
64 bytes from github.com (192.30.252.129): icmp_seq=11 ttl=46 time=331 ms
64 bytes from github.com (192.30.252.129): icmp_seq=12 ttl=46 time=448 ms
64 bytes from github.com (192.30.252.129): icmp_seq=13 ttl=46 time=392 ms
64 bytes from github.com (192.30.252.129): icmp_seq=14 ttl=46 time=365 ms
64 bytes from github.com (192.30.252.129): icmp_seq=15 ttl=46 time=307 ms
64 bytes from github.com (192.30.252.129): icmp_seq=16 ttl=46 time=441 ms
64 bytes from github.com (192.30.252.129): icmp_seq=17 ttl=46 time=385 ms
64 bytes from github.com (192.30.252.129): icmp_seq=18 ttl=46 time=331 ms
64 bytes from github.com (192.30.252.129): icmp_seq=19 ttl=46 time=412 ms
64 bytes from github.com (192.30.252.129): icmp_seq=20 ttl=46 time=463 ms
^C
--- github.com ping statistics ---
20 packets transmitted, 20 received, 0% packet loss, time 19034ms
rtt min/avg/max/mdev = 307.725/396.345/532.530/55.804 ms

因为樯发疯了

秒开嘛，也是电信的