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Q:

ping tracert stackoverflow

// Ping is a networking utility program or a tool 
// to test if a particular host is reachable.
// Ping sends a packet 
// and gets it back to monitor statistics


ping www.google.com

yulin@Yus-MacBook-Air ~ % ping www.google.com
PING www.google.com (172.217.12.164): 56 data bytes
64 bytes from 172.217.12.164: icmp_seq=0 ttl=54 time=30.155 ms
64 bytes from 172.217.12.164: icmp_seq=1 ttl=54 time=24.548 ms
64 bytes from 172.217.12.164: icmp_seq=2 ttl=54 time=20.656 ms
64 bytes from 172.217.12.164: icmp_seq=3 ttl=54 time=22.961 ms
64 bytes from 172.217.12.164: icmp_seq=4 ttl=54 time=29.101 ms
64 bytes from 172.217.12.164: icmp_seq=5 ttl=54 time=20.582 ms
64 bytes from 172.217.12.164: icmp_seq=6 ttl=54 time=20.347 ms
--- www.google.com ping statistics ---
88 packets transmitted, 88 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 19.120/23.303/46.777/4.749 ms


// The traceroute (windows: tracert) command is a Command Prompt command 
// that's used to show several details 
// about the path that a packet takes from 
// the computer or device you're on to 
// whatever destination you specify.

//  9  * * * (means I'm behind a firewall)

traceroute www.google.com

yulin@Yus-MacBook-Air ~ % traceroute www.google.com
traceroute to www.google.com (172.217.12.164), 64 hops max, 52 byte packets
 1  10.0.0.1 (10.0.0.1)  6.099 ms  4.425 ms  4.065 ms
 2  96.120.65.29 (96.120.65.29)  19.416 ms  16.598 ms  15.994 ms
 3  162.151.170.21 (162.151.170.21)  15.539 ms  17.207 ms  16.632 ms
 4  162.151.151.170 (162.151.151.170)  15.334 ms  16.686 ms  16.844 ms
 5  be-345-ar01.needham.ma.boston.comcast.net (96.108.70.33)  17.782 ms  19.520 ms  19.729 ms
 6  be-7015-cr02.newyork.ny.ibone.comcast.net (68.86.90.217)  24.997 ms  24.851 ms  24.390 ms
 7  be-10390-pe03.111eighthave.ny.ibone.comcast.net (68.86.83.90)  24.843 ms  31.563 ms  25.073 ms
 8  as174.600wseventh.ca.ibone.comcast.net (66.208.229.114)  24.941 ms  23.448 ms
    66.208.229.86 (66.208.229.86)  27.151 ms
 9  * * *
10  216.239.62.170 (216.239.62.170)  25.216 ms
    216.239.62.146 (216.239.62.146)  24.494 ms
    216.239.62.170 (216.239.62.170)  24.947 ms
11  108.170.248.35 (108.170.248.35)  26.169 ms
    108.170.248.116 (108.170.248.116)  33.111 ms
    108.170.248.99 (108.170.248.99)  25.593 ms
12  lga25s62-in-f4.1e100.net (172.217.12.164)  23.619 ms  31.648 ms
    209.85.255.36 (209.85.255.36)  24.935 ms

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