为何 ping 127.0.0.15这个地址也能ping通呢？

jayli426

ping 127.0.0.15
PING 127.0.0.15 (127.0.0.15) 56(84) bytes of data.
64 bytes from 127.0.0.15: icmp_seq=1 ttl=64 time=0.022 ms
64 bytes from 127.0.0.15: icmp_seq=2 ttl=64 time=0.011 ms
64 bytes from 127.0.0.15: icmp_seq=3 ttl=64 time=0.011 ms
64 bytes from 127.0.0.15: icmp_seq=4 ttl=64 time=0.017 ms
64 bytes from 127.0.0.15: icmp_seq=5 ttl=64 time=0.011 ms

--- 127.0.0.15 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 3998ms


但是我从来没有配置过127.0.0.15这个IP地址啊，其实127.0.0.1到127.0.0.15都能ping通
127.0.0.0这个网段地址有何特殊吗？

天雨无心

所有的127.×.×.×，都是环回地址，所以你都可以ping通。

ssffzz1

LINUX??

aplah

Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.

C:\Documents and Settings\11>ping 127.0.0.254

Pinging 127.0.0.254 with 32 bytes of data:

Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64
Reply from 127.0.0.1: bytes=32 time<1ms TTL=64

Ping statistics for 127.0.0.254:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\Documents and Settings\11>

windows事实也是如此

chenyx

整个127段都是loopback口,都由127.0.0.1回复

malink

是啊，这是常识，本地回环

CloudF_N

netstat -rn 看一下路由表就什么都清楚了