However, if the packet does enter a loop, the TTL will eventually decrement until the packet expires. Usually, this TTL value is set to a number where the packet has more than enough time to reach its destination before it hits 0. Every time it arrives at a server, it subtracts one off of its TTL value. When the packet is sent off on its journey, it will make multiple stops across different servers. If this value ever hits 0, the packet is deemed "dead" and is destroyed. The smart minds behind the data packet came up with a solution to fix this, called “time-to-live” or “TTL.” Every packet, before it’s sent off into the great unknown, is given a number greater than 0 for its TTL value. And if that happens too often, a network can be stuffed full of packets going round and round forever. If an engineer makes a mistake while setting up a server, it’s possible for packets to be sent in an infinite loop between servers. Unfortunately, networks can be finicky things. It takes the quickest route it can from point A to point B and doesn’t get stuck or held up. Ideally, when a computer sends a packet from one place to another, it gets there without any issue. And to better understand how this exploit works, we need to look at a network packet’s “time-to-live.” What Is a Packet's "Time-to-Live"? In fact, Traceroute’s invention is all thanks to a clever exploit. However, did you know that the internet was initially designed without Traceroute in mind? Traceroute is a handy way to diagnose network errors.
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