The sender increases the TTL by 1 and sends the next series of packets. The receiving device will send back an ICMP type 11, code 0 packet ( time exceeded), and the packet is logged. The command will start with a TTL value of 1 indicating the packet can only go as far as the next device between the initiator and the target. The TTL is the number of times the packet can be rebroadcast by the next host encountered on the network or hops.
This command works by manipulating the packets time to live value or TTL. Traceroute uses ICMP’s Ping command to find out how many different devices are between the computer initiating the traceroute and the target.
James Broad, Andrew Bindner, in Hacking with Kali, 2014 Traceroute
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