Dr. Mark Humphrys

School of Computing. Dublin City University.

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CA216      CA249      CA318

CA400      CA651      CA668


  How to find your IP address

Do lookups online


Network tools




Linux / UNIX



Exercise

Look up who owns yahoo.com
Look up who owns the "typo" yahooo.com
What is the smallest number of o's before someone outside Yahoo owns the domain?
What is the smallest number of o's before no one owns the domain?
See Typosquatting


Windows



Traceroute




Visual TraceRoute using Google Maps.
Does trace from US server outwards.
Transatlantic link may be ocean floor cable or may be satellite.



Feeds      w2mind.org

On Internet since 1987.