100-150 Question 11
Single answerA network engineer is troubleshooting an issue where data is being sent from a web server to a client, but the client is unable to reassemble the data correctly. The engineer suspects that the issue lies within a specific layer of the TCP/IP model. Which layer is most likely responsible for this problem?
- A
Application Layer
- B
Transport Layer
- C
Network Layer
- D
Data Link Layer
Show answer and explanation
Correct answer: B
Explanation
The Transport Layer of the TCP/IP model handles segmentation and reassembly of data. If the data is not being reassembled properly on the client side, it suggests a problem at this layer, such as an issue with TCP headers, sequence numbers, or error correction mechanisms. The other layers focus on different aspects of network communication, making the Transport Layer the correct answer.
- A. Incorrect.
The Application Layer is responsible for user interfaces, protocols, and services such as HTTP or FTP. It does not handle data segmentation or reassembly, so it is unlikely to be the cause of the issue.
- B. Correct.
The Transport Layer is responsible for segmenting data, ensuring reliable delivery, and reassembling data on the recipient's end. If the client cannot reassemble the data, it is likely an issue at this layer.
- C. Incorrect.
The Network Layer is responsible for routing and addressing packets across the network. While errors at this layer might prevent data from reaching the client, they would not directly cause reassembly issues.
- D. Incorrect.
The Data Link Layer is responsible for local delivery of frames within the same network segment. It does not deal with end-to-end data segmentation or reassembly.