Which of the following statements is/are correct? I. The fragmentation is applicable for data in the datagram but not for header. II. Reassembly of the fragments must be performed at the destination...

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Extracted text: Which of the following statements is/are correct? I. The fragmentation is applicable for data in the datagram but not for header. II. Reassembly of the fragments must be performed at the destination because, the intermediate networks may have different maximum transmission unit (MTU) sizes. III. In the IP header, the time-to-live (TTL) field is invariable. (A) I and II (B) I and III (C) II and III (D) All are correct