这是一个创建于 1258 天前的主题，其中的信息可能已经有所发展或是发生改变。
一段 ping 命令的执行返回：
[root@node1 ~]# ping baidu.com
PING baidu.com (220.181.38.148) 56(84) bytes of data.
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=1 ttl=49 time=35.9 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=2 ttl=49 time=67.4 ms
64 bytes from 220.181.38.148 (220.181.38.148): icmp_seq=3 ttl=49 time=37.6 ms
^C
--- baidu.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 35.947/47.022/67.444/14.457 ms
[root@node1 ~]# ping github.com
PING github.com (13.229.188.59) 56(84) bytes of data.
64 bytes from ec2-13-229-188-59.ap-southeast-1.compute.amazonaws.com (13.229.188.59): icmp_seq=1 ttl=42 time=121 ms
64 bytes from ec2-13-229-188-59.ap-southeast-1.compute.amazonaws.com (13.229.188.59): icmp_seq=2 ttl=42 time=119 ms
64 bytes from ec2-13-229-188-59.ap-southeast-1.compute.amazonaws.com (13.229.188.59): icmp_seq=3 ttl=42 time=126 ms
^C
--- github.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 119.436/122.369/126.585/3.069 ms
[root@node1 ~]#
疑问的是 ping github 的返回中 ec2-13-229-188-59.ap-southeast-1.compute.amazonaws.com 是拿来的，ping 返回的数据格式怎么理解？
4 条回复 • 2021-06-17 15:11:10 +08:00
 |
1
013231 2021-06-17 14:57:32 +08:00
IP 地址 Reverse DNS 的结果
|
 |
2
miaomiao888 2021-06-17 14:58:42 +08:00
CNAME
|
|
3
miaomiao888 2021-06-17 15:03:18 +08:00
@miaomiao888 错了，这么长还带 IP 的是 rDNS
|
 |
4
thunderw 2021-06-17 15:11:10 +08:00
这个叫做 PTR (DNS Pointer Record)记录
59.188.229.13.in-addr.arpa name = ec2-13-229-188-59.ap-southeast-1.compute.amazonaws.com. |
Select Language