traceroute
A command line utility on Unix and NT (known as tracert
) to know the hops and the IPs of the routers between the source and the destination.
Utilizes multiple icmp packets being sent towards the source with varied TTL numbers.
- First it will be set to 1, then each subsequent packet will have it incremented by 1.
- each time the router will send a reply with the Time Exceeded in transit command (Type = 11, Code = 0).