How Does Traceroute Work In Linux?
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Traceroute is a network diagnostic tool used to determine the route taken by packets across an IP network. It works by sending a series of ICMP (Internet Control Message Protocol) echo request packets to the destination with increasing TTL (Time To Live) values. Each router along the path to the destination will decrement the TTL by one, and if the TTL is 0, the router will send an ICMP TTL exceeded in transit message back to the source. Traceroute will then log the IP address of the router that sent the ICMP message and the round-trip time it took for each packet to get there. This process is repeated until the destination is reached.