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Exam 312-38 All Questions

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Exam 312-38 topic 1 question 8 discussion

Actual exam question from ECCouncil's 312-38
Question #: 8
Topic #: 1
[All 312-38 Questions]

Which of the following is a 16-bit field that identifies the source port number of the application program in the host that is sending the segment?

  • A. Sequence Number
  • B. Header Length
  • C. Acknowledgment Number
  • D. Source Port Address
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Suggested Answer: D 🗳️
Source Port Address is a 16-bit field that identifies the source port number of the application program in the host that is sending the segment.
Answer option C is incorrect. This is a 32-bit field that identifies the byte number that the sender of the segment is expecting to receive from the receiver.
Answer option B is incorrect. This is a 4-bit field that defines the 4-byte words in the TCP header. The header length can be between 20 and 60 bytes. Therefore, the value of this field can be between 5 and 15.
Answer option A is incorrect. This is a 32-bit field that identifies the number assigned to the first byte of data contained in the segment.

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surfuganda
1 year, 1 month ago
Selected Answer: D
The 16-bit field that identifies the source port number of the application program in the host that is sending the segment is option D: Source Port Address. Here's a brief explanation of each option: A. Sequence Number: This field is used for ordering and sequencing segments and is not related to identifying the source port. B. Header Length: This field specifies the length of the TCP header and is not used to identify the source port. C. Acknowledgment Number: This field is used for acknowledging received data and is not related to identifying the source port. D. Source Port Address: This is the correct choice. The source port address in a TCP header indicates the port number of the application sending the data. It helps the receiving end identify the source application on the sender's host.
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