CompTIA Network+ (N10-007) — Question 394

Which of the following statements about the OSI model is true?

Answer options

• A. The application layer does not need to know what type of network is being used because that is dealt with by a layer below it.
• B. The network layer deals with the network cabling and network device interface compatibility.
• C. The transport layer deals with how the data is transported from one router to another based on the IP header.
• D. The model consists of four layers that describe the requirements a technician follows to troubleshoot and support a network.

Correct answer: A

Explanation

Option A is correct because the application layer operates independently of the underlying network specifics, which are handled by the transport and network layers. Option B is incorrect as the network layer is responsible for routing and addressing, not cabling or device interfaces. Option C is wrong because the transport layer focuses on end-to-end communication rather than routing between routers. Option D is also incorrect since the OSI model has seven layers, not four.