UC知道Ping IP命令到请进
来源：百度知道 编辑：UC知道 时间：2024/06/19 15:33:46
Pinging 10.61.128.252 with 32 bytes of data:
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Ping statistics for 10.61.128.252:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
C:\>ping 10.61.130.254
Pinging 10.61.130.254 with 32 bytes of data:
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Ping statistics for 10.61.130.254:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times i
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Reply from 10.61.128.252: bytes=32 time<10ms TTL=127
Ping statistics for 10.61.128.252:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
C:\>ping 10.61.130.254
Pinging 10.61.130.254 with 32 bytes of data:
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Reply from 10.61.130.254: bytes=32 time<10ms TTL=255
Ping statistics for 10.61.130.254:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times i
TTL（生存时间）
TTL是IP协议包中的一个值，它告诉网络路由器包在网络中的时间是否太长而应被丢弃。有很多原因使包在一定时间内不能被传递到目的地。例如，不正确的路由表可能导致包的无限循环。一个解决方法就是在一段时间后丢弃这个包，然后给发送者一个报文，由发送者决定是否要重发。TTL的初值通常是系统缺省值，是包头中的8位的域。TTL的最初设想是确定一个时间范围，超过此时间就把包丢弃。由于每个路由器都至少要把TTL域减一，TTL通常表示包在被丢弃前最多能经过的路由器个数。当记数到0时，路由器决定丢弃该包，并发送一个ICMP报文给最初的发送者。