Local Area Network (LAN)
Electronic Network Routing
If you have a UABPA VAX account, you can use the TRACEROUTE command
to illustrate the often-times complicated electronic routing a mail
message or network connection may take before reaching its destination.
For example, let's first look at the routing between UABPA and one
of the CCIT VAX machines (named VIOLET):
TRACEROUTE VIOLET.CCIT.Arizona.EDU <RET>
The output is:
Traceroute to violet.ccit.arizona.edu (128.196.120.73), 30 hops
max, 40 byte pac
- BPA-UA-40.BPA.Arizona.EDU (128.196.40.1) 1 ms 0 ms 1 ms
- Westgate-AStar-OC3.Telcom.Arizona.EDU (150.135.112.129) 1 ms
1 ms 1 ms
- Loco.Telcom.Arizona.EDU (128.196.1.7) 2 ms 2 ms 1 ms
- Violet.CCIT.Arizona.EDU (128.196.120.73) 2 ms 1 ms 2 ms
Now let's try going outside the University of Arizona and tracing
the route to Georgetown University:
TRACEROUTE Georgetown.EDU <RET>
The output is:
Traceroute to georgetown.edu (141.161.1.46), 30 hops max, 40
byte packets
- BPA-UA-40.BPA.Arizona.EDU (128.196.40.1) 1 ms 0 ms 1 ms
- Westgate-AStar-OC3.Telcom.Arizona.EDU (150.135.112.129) 1 ms
1 ms 1 ms
- Pancho.Telcom.Arizona.EDU (128.196.1.10) 2 ms 2 ms 2 ms
- Mongo-POS0-3-Pancho.telcom.arizona.edu (192.80.43.5) 3 ms 1
ms 2 ms
- Virgil-POS5-0-0-Mongo.telcom.arizona.edu (192.80.43.14) 1 ms
1 ms 1 ms
- 192.80.43.22 (192.80.43.22) 18 ms 19 ms 18 ms
- kscy-denv.abilene.ucaid.edu (198.32.8.14) 29 ms 29 ms 28 ms
- ipls-kscy.abilene.ucaid.edu (198.32.8.6) 38 ms 38 ms 38 ms
- clev-ipls.abilene.ucaid.edu (198.32.8.26) 44 ms 44 ms 45 ms
- nycm-clev.abilene.ucaid.edu (198.32.8.30) 56 ms 57 ms 56 ms
- 141.161.184.9 (141.161.184.9) 66 ms 65 ms 66 ms
- rsc-rtr1.gtunet.georgetown.edu (141.161.100.83) 66 ms 66 ms
68 ms
- thumper.georgetown.edu (141.161.1.46) 67 ms
In this example, your message passed through 13 distinct computer
systems around the country before finally arriving at the Georgetown
system.
The ms timings are in milliseconds and depict the maximum, average,
and minimum time it took the message to reach that particular computer.
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