What is TTL? And what is the difference between 64 and 128?

Question

Computer networks

What is TTL? I know that TTL is 128 on computers, and 64 on mobile phones. I set TTL 64 on my computer and the Internet connection has not changed in any way. So what's the difference, what is your TTL, if it doesn't affect anything?

Answer 1

Briefly, TTL sets the packet lifetime. When passing through the router, the TTL is reduced by one, if the TTL of the packet is equal to one, then such a packet is not routed further, but is discarded. In other words, a packet with a TTL of 64 will travel at most 64 routers. You can see how many routers are on the way from one system to another using the tracepath/tracert/traceroute utilities. Usually on the Internet no more than 20-30 routers overcome the packet even to very remote systems.

Answer 2

https://ru.wikipedia.org/wiki/Time_to_live