200-201 Question 127
Select 2A security analyst is troubleshooting a network issue where packets sent between two devices are not reaching their destination. Upon inspection, the analyst discovers that the encapsulation process is not functioning correctly. Which of the following issues could be caused by an incorrect encapsulation process during packet transmission?
- A
The packet fails to reach its destination due to incorrect addressing information being added to the headers.
- B
The data payload becomes corrupted during transmission, making the packet unreadable at the destination.
- C
The packet is dropped by intermediary devices because the encapsulation format is not recognized.
- D
The packet is successfully delivered but the application layer data is not properly interpreted by the receiving device.
- E
The packet bypasses security inspection due to missing encryption during the encapsulation process.
Show answer and explanation
Correct answers: A, C
Explanation
Encapsulation is the process of adding headers and sometimes trailers to data as it is prepared for transmission. If this process fails, it can lead to issues such as incorrect addressing (causing delivery failures) or unrecognized formats (causing packet drops by intermediary devices). Understanding encapsulation is essential for identifying and resolving such network issues.
- A. Correct.
Correct. Incorrect addressing in headers, such as source or destination IP, can result from faulty encapsulation, preventing the packet from reaching its destination.
- B. Incorrect.
Incorrect. Encapsulation does not directly cause data corruption; this is more likely due to transmission errors, not the encapsulation process itself.
- C. Correct.
Correct. If the encapsulation format is invalid or not recognized by network devices, packets may be dropped during transmission.
- D. Incorrect.
Incorrect. Application layer data interpretation issues are not directly related to encapsulation; they are more related to protocols or configuration at the application layer.
- E. Incorrect.
Incorrect. While encryption can be part of secure communications, it is not a direct function of the encapsulation process. Encapsulation focuses on wrapping data with headers and trailers.