What happens to the TTL field of an IP datagram every time it reaches a router?

Related questions

1. What is a TTL DNS?
2. How does DNS Cname work?
3. What is the maximum TTL value?
4. Why does DNS propagation take so long?
5. How is TTL determined in Ping?
6. What is DNS Cname example?
7. What is Cname in DNS settings?
8. What is PTR record in DNS?
9. What should TTL value?
10. What is stub zone in DNS Example?

Tags

1. #least
2. #packet
3. #eight
4. #decreases
5. #initial
6. #header
7. #reduced
8. #forwarding
9. #sender
10. #route
11. #datagram
12. #router
13. #destination
14. #field
15. #digit
16. #binary
17. #value
18. #sending
19. #packets
20. #every