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by Kenjiro Cho #07 11/28/2002

path measurement

• observe a path to a certain host
  
  
  • hop count measurement
    
    
    • how many routers between 2 hosts
      
      
• topology measurement
  
  
  • figure out network connections
    
    
    • by path measurement
      
      
      • from 1 location to many locations
        
        
      • from multiple locations (router has multiple IP addresses)
        
        
    • by routing information
      
      
    • route flapping