当我对广播地址执行 ping 操作时，我得到了自环回 127.0.0.1 的回复。这种情况是正确的还是应该从最长前缀 IP 得到回复？
ping 255.255.255.255
PING 255.255.255.255 (255.255.255.255): 40 data bytes
68 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=2 ms
68 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=1 ms
68 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=1 ms
68 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=2 ms
68 bytes from 127.0.0.1: icmp_seq=5 ttl=64 time=1 ms
--- 255.255.255.255 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss round-trip min/avg/max/stddev = 1/1/2/<1