Q: Which Internet Protocol (IP) v6 field is identical in purpose to the TTL field in an IPv4 header?
or
Q: Which field in an IPv6 packet serves the same function as the TTL field in an IPv4 header?
- Traffic class
- Flow label
- Hop Limit
- Next header
Explanation: Hop Limit” is the field in IPv6 that serves the same function as the Time-to-Live (TTL) field in an IPv4 header; however, IPv6 refers to this field by a different name. The Hop Limit field allows the maximum number of routers that a packet is permitted to go through before it is considered to have failed its journey and been rejected. It performs a function similar to that of the TTL field in IPv4, namely assisting to stop packets from being sent back and forth across the network indefinitely.
