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35 votes
35 votes

Which of the following fields of an IP header is NOT modified by a typical IP router?

  1. Check sum
  2. Source address
  3. Time to Live (TTL)
  4. Length
  • 🚩 Edit necessary | 👮 Arjun | 💬 “better answer needed”
1 flag

7 Answers

Best answer
42 votes
42 votes
Source Address.
edited by
4 votes
4 votes
Since it has been asked for IP Header so Source adress will not change but if it was about the frame than source address (i.e MAC Address) is changed.
3 votes
3 votes

Ans B

Length and checksum can be modified when IP fragmentation happens. Time to live is reduced by every router on the route to destination.

Answer:

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