Question

An IPv4 datagram with header length=5 and total length=400 bytes carries ________.
 

• A. 380 bytes payload
• B. 400 bytes payload
• C. 20 bytes header
• D. 320 bytes payload

Hint:

To calculate the payload size, subtract the header length from the total length of the datagram.

Answer 1

The Correct Option is A

The total length of an IPv4 datagram includes both the header and the payload. The IPv4 header length is given as 5, which corresponds to 5 * 4 = 20 bytes. Thus, the payload is the total length minus the header length: 400 - 20 = 380 bytes.