TCP/IP 笔记 7 Ping
lenovo-myc@lenovomyc-Lenovo-Product:~$ ping www.baidu.com PING www.a.shifen.com (123.125.65.82) 56(84) bytes of data. 这句出现前的延时，为DNS对域名的解析时间 64 bytes from 123.125.65.82: icmp_seq=1 ttl=50 time=2.60 ms 这句time如果较长，可能是发送ARP请求和接受ARP应答所花的时间 64 bytes from 123.125.65.82: icmp_seq=2 ttl=50 time=3.36 ms 64 bytes from 123.125.65.82: icmp_seq=3 ttl=50 time=2.38 ms 64 bytes from 123.125.65.82: icmp_seq=4 ttl=50 time=2.75 ms 64 bytes from 123.125.65.82: icmp_seq=5 ttl=50 time=3.64 ms ^C --- www.a.shifen.com ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4006ms rtt min/avg/max/mdev = 2.382/2.950/3.647/0.480 ms lenovo-myc@lenovomyc-Lenovo-Product:~$ ping 123.125.65.78 PING 123.125.65.78 (123.125.65.78) 56(84) bytes of data. 64 bytes from 123.125.65.78: icmp_seq=1 ttl=50 time=2.45 ms 64 bytes from 123.125.65.78: icmp_seq=2 ttl=50 time=2.35 ms 64 bytes from 123.125.65.78: icmp_seq=3 ttl=50 time=2.19 ms 64 bytes from 123.125.65.78: icmp_seq=4 ttl=50 time=2.94 ms 64 bytes from 123.125.65.78: icmp_seq=5 ttl=50 time=2.59 ms 64 bytes from 123.125.65.78: icmp_seq=6 ttl=50 time=2.71 ms 64 bytes from 123.125.65.78: icmp_seq=7 ttl=50 time=2.57 ms ^C --- 123.125.65.78 ping statistics --- 7 packets transmitted, 7 received, 0% packet loss, time 6008ms rtt min/avg/max/mdev = 2.193/2.547/2.947/0.232 ms
ping -s packetsize 指定数据包大小，默认为56
-s packetsize
Specifies the number of data bytes to be sent. The default is
56, which translates into 64 ICMP data bytes when combined with
the 8 bytes of ICMP header data.
lenovo-myc@lenovomyc-Lenovo-Product:~$ ping -s 4 www.baidu.com PING www.a.shifen.com (220.181.112.244) 4(32) bytes of data. 12 bytes from 220.181.112.244: icmp_seq=1 ttl=45 12 bytes from 220.181.112.244: icmp_seq=2 ttl=45 12 bytes from 220.181.112.244: icmp_seq=3 ttl=45 12 bytes from 220.181.112.244: icmp_seq=4 ttl=45 12 bytes from 220.181.112.244: icmp_seq=5 ttl=45 ^C --- www.a.shifen.com ping statistics --- 6 packets transmitted, 5 received, 16% packet loss, time 5006ms
查看中间路由。。。没找到可以测的网址
lenovo-myc@lenovomyc-Lenovo-Product:~$ ping -R www.baidu.com PING www.a.shifen.com (220.181.111.188) 56(124) bytes of data. 64 bytes from 220.181.111.188: icmp_seq=1 ttl=45 time=186 ms NOP RR: 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 64 bytes from 220.181.111.188: icmp_seq=2 ttl=45 time=184 ms NOP RR: 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 64 bytes from 220.181.111.188: icmp_seq=3 ttl=45 time=178 ms NOP RR: 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 64 bytes from 220.181.111.188: icmp_seq=4 ttl=45 time=176 ms NOP RR: 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 220.181.111.188 ^C --- www.a.shifen.com ping statistics --- 5 packets transmitted, 4 received, 20% packet loss, time 4006ms rtt min/avg/max/mdev = 176.328/181.574/186.643/4.214 ms
ping同一个网段
lenovo-myc@lenovomyc-Lenovo-Product:~$ ping -R 10.100.156.2 PING 10.100.156.2 (10.100.156.2) 56(124) bytes of data. 64 bytes from 10.100.156.2: icmp_seq=1 ttl=255 time=2.30 ms NOP RR: 10.100.156.2 10.100.156.2 10.100.156.2 10.100.156.2 64 bytes from 10.100.156.2: icmp_seq=2 ttl=255 time=2.53 ms NOP (same route) 64 bytes from 10.100.156.2: icmp_seq=3 ttl=255 time=1.11 ms NOP (same route) 64 bytes from 10.100.156.2: icmp_seq=4 ttl=255 time=4.45 ms NOP (same route) ^C --- 10.100.156.2 ping statistics --- 5 packets transmitted, 4 received, 20% packet loss, time 4005ms rtt min/avg/max/mdev = 1.110/2.602/4.459/1.200 ms
