Exams › GATE › Technical

In an IPv4 datagram, the M bit is 0, the value of HLEN is 10, the value of total length is 400 and the fragment offset value is 300. The position of the datagram, the sequence numbers of the first and the last bytes of the payload, respectively are

1. Last fragment, 2400 and 2789
2. First fragment, 2400 and 2759
3. Last fragment, 2400 and 2759
4. Middle fragment, 300 and 689

Correct answer: Last fragment, 2400 and 2759

Solution

The M bit being 0 indicates that this is the last fragment. The HLEN of 10 means the header is 40 bytes, and with a total length of 400 bytes, the payload is 360 bytes. The fragment offset of 300 indicates that the first byte of the payload starts at byte 2400 (300 * 8) and ends at byte 2759 (2400 + 360 - 1), confirming the correct option.

Related GATE Technical questions

• The truth table X Y f(X,Y) 0 0 0 0 1 0 1 0 1 1 1 1 represents the Boolean function
• The decimal value 0.5 in IEEE single precision floating point representation has
• A process executes the code fork(); fork(); fork(); The total number of child processes created is
• The protocol data unit (PDU) for the application layer in the Internet stack is
• Which of the following problems are decidable? 1) Does a given program ever produce an output? 2) If L is a context-free language, then is L̄ also context-free? 3) If L is a regular language, then is L̄ also regular? 4) If L is a recursive language, then is L̄ also recursive?
• A binary operation ⊕ on a set of integers is defined as x ⊕ y = x² × y². Which one of the following statements is TRUE about ⊕?

⚔️ Practice GATE Technical free + battle 1v1 →