TCP IP Illustrated

Tucnoaoedu 1402521183 218 ms 227 ms 233 ms 2

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Unformatted text preview: to nic.ddn.mil (192.112.36.5), 30 hops max, 40 byte packets 1 netb.tuc.noao.edu (140.252.1.183) 218 ms 227 ms 233 ms 2 gateway.tuc.noao.edu (140.252.1.4) 233 ms 229 ms 204 ms 3 butch.telcom.arizona.edu (140.252.104.2) 204 ms 228 ms 234 ms 4 Gabby.Telcom.Arizona.EDU (128.196.128.1) 234 ms 228 ms 204 ms 5 NSIgate.Telcom.Arizona.EDU (192.80.43.3) 233 ms 228 ms 234 ms 6 JPLI.NSN.NASA.GOV (128.161.88.2) 234 ms 590 ms 262 ms 7 JPL3.NSN.NASA.GOV (192.100.15.3) 238 ms 223 ms 234 ms 8 GSFC3.NSN.NASA.GOV (128.161.3.33) 293 ms 318 ms 324 ms 9 GSFC8.NSN.NASA.GOV (192.100.13.8) 294 ms 318 ms 294 ms 10 SURA2.NSN.NASA.GOV (128.161.166.2) 323 ms 319 ms 294 ms 11 nsn-FIX-pe.sura.net (192.80.214.253) 294 ms 318 ms 294 ms 12 GSI.NSN.NASA.GOV (128.161.252.2) 293 ms 318 ms 324 ms 13 NIC.DDN.MIL (192.112.36.5) 324 ms 321 ms 324 ms Figure 8.4 traceroute from host sun to nic.ddn.mil. Since running this example for inclusion in the text, the NIC for non-DDN sites (i.e., nonmilitary) has moved from nic.ddn.mil to rs.internic.net, the new "InterNIC." Once the datagrams leave the tuc.noao.edu network they enter the telcom.arizona.edu network. They then enter the NASA Science Internet, nsn.nasa.gov. The routers for TTLs 6 and 7 are at the Jet Propulsion Laboratory (JPL). The network sura. net in the output for TTL II is the Southeastern Universities Research file:///D|/Documents%20and%20Settings/bigini/Docu...homenet2run/tcpip/tcp-ip-illustrated/tracerou.htm (7 of 17) [12/09/2001 14.46.47] Traceroute Program Association Network. The name GSI at TTL 12 is Government Systems, Inc., the operator of the NIC. The second RTT for the TTL of 6 (590) is almost double the other two RTTs (234 and 262). This illustrates the dynamics of IP routing. Something happened somewhere between the sending host and this router that slowed down this datagram. Also, we can't tell if it was the outbound datagram that got held up or the return ICMP error. The RTT for the first probe with a TTL of 3 (204) is less than the RTT for the first probe with a TTL of 2 (233). Since each printed RTT is the t...
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This test prep was uploaded on 04/04/2014 for the course ECE EL5373 taught by Professor Guoyang during the Spring '12 term at NYU Poly.

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