How does traceroute work?

traceroute works by sending packets with low time to live (TTL) fields.  the TTL specifies how many hops the packet is allowed before it is returned.  when a packet can't reach it's destination because the TTL value is too low, the last host returns the packet and identifies itself.  by sending the sending the series of packets and incrementing the TTL value with each successive packet, traceroute finds out who all the intermediary hosts are.

 traceroute is used to find the quality of internet connection.

the cmd is used as: tracert yahoo.com

depending on the ms values displayed after the processing of the cmd, the latency is found and the quality is determined.