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Probing the Internet Keng Siau University of Nebraska-Lincoln Ping One of the simplest probing tools ping www.netbook.cs.purdue.edu Can be used to test whether a remote computer is alive Ping sends a message to specified computer wait a short time for a response

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probing the internet

Probing the Internet

Keng SiauUniversity of Nebraska-Lincoln

slide2
Ping
  • One of the simplest probing tools
    • ping www.netbook.cs.purdue.edu
  • Can be used to test whether a remote computer is alive
    • Ping sends a message to specified computer
    • wait a short time for a response
    • if a response arrives, ping reports that the remote computer is alive
slide3
Ping
  • Possible options
    • user can specify the size of the packet sent
    • compute the round trip time
    • repeatedly send one message per second until the program is stopped
traceroute
Traceroute
  • Use to determine the intermediate computers along the path to a remote computer
    • traceroute www.netbook.cs.purdue.edu
  • Provide more information than ping
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