Answer:
The fields of the IPv4 header change from router to router is:
- No Fragmentation - TTL, checksum(due to TTL).
- Fragmentation - Total length field, fragment M bit.
Explanation:
TTL - TTL stands for Time-TO-Live, it is important in an IP(Internet Protocol) packets that says a network router if or not the packets have been in the network so lengthy and should be rejected.
Fragmentation - It is done through the network layer when the mostly size of data-gram is higher than max size of data that can held a frame.
It is done through the network layer at the end side and is generally done at routers.
