Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Host A (on TCP/IP v4 network A) sends an IP d...
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Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?
i. TTL
ii. Checksum
iii. Fragment Offset
i. TTL
ii. Checksum
iii. Fragment Offset
- a)i only
- b)i and ii only
- c)ii and iii only
- d)i, ii and iii
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also...
The Answer is OPTION D.
Whenever an IP packet is transmitted, the value in Time to Live (TTL) field will be decremented on every single hop. Hence, TTL is changed on every hop.
Now, since TTL changes, hence the Checksum of the packet will also change.
For the Fragmentation offset, A packet will be fragmented if the packet has a size greater than the Maximum Transmission Unit (MTU) of the network. Hence, Fragmentation offset can also be changed.
Whenever an IP packet is transmitted, the value in Time to Live (TTL) field will be decremented on every single hop. Hence, TTL is changed on every hop.
Now, since TTL changes, hence the Checksum of the packet will also change.
For the Fragmentation offset, A packet will be fragmented if the packet has a size greater than the Maximum Transmission Unit (MTU) of the network. Hence, Fragmentation offset can also be changed.
Most Upvoted Answer
Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also...
Explanation:
TTL (Time-to-Live):
- The TTL field in the IP header indicates the maximum number of hops (routers) that an IP datagram can pass through before being discarded.
- When an IP datagram is forwarded by a router, the TTL value is decremented by 1.
- As the datagram travels from network A to network B, the TTL value may be different based on the number of routers it passes through.
Checksum:
- The checksum field in the IP header is used for error-checking purposes.
- It is calculated by the sender and verified by the receiver to ensure the integrity of the IP datagram.
- If the IP datagram is fragmented during transmission, the checksum may need to be recalculated for each fragment.
Fragment Offset:
- The fragment offset field is used in IP fragmentation to reassemble fragmented datagrams at the receiver.
- When a datagram is fragmented, each fragment contains a different fragment offset value.
- As the fragments are reassembled at the destination host, the fragment offset values may be different from the original datagram D.
Therefore, when IP datagram D reaches host B on network B, all three IP header fields (TTL, checksum, and fragment offset) may be different from the original datagram D due to the nature of IP routing and fragmentation in the network.
TTL (Time-to-Live):
- The TTL field in the IP header indicates the maximum number of hops (routers) that an IP datagram can pass through before being discarded.
- When an IP datagram is forwarded by a router, the TTL value is decremented by 1.
- As the datagram travels from network A to network B, the TTL value may be different based on the number of routers it passes through.
Checksum:
- The checksum field in the IP header is used for error-checking purposes.
- It is calculated by the sender and verified by the receiver to ensure the integrity of the IP datagram.
- If the IP datagram is fragmented during transmission, the checksum may need to be recalculated for each fragment.
Fragment Offset:
- The fragment offset field is used in IP fragmentation to reassemble fragmented datagrams at the receiver.
- When a datagram is fragmented, each fragment contains a different fragment offset value.
- As the fragments are reassembled at the destination host, the fragment offset values may be different from the original datagram D.
Therefore, when IP datagram D reaches host B on network B, all three IP header fields (TTL, checksum, and fragment offset) may be different from the original datagram D due to the nature of IP routing and fragmentation in the network.
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Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer?
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Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer?.
Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer?.
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Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?i. TTLii. Checksumiii. Fragment Offseta)i onlyb)i and ii onlyc)ii and iii onlyd)i, ii and iiiCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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