CCNA: Cisco Certified Network Associate — Question 111

Which two statements about the purpose of the OSI model are accurate? (Choose two.)

Answer options

• A. Defines the network functions that occur at each layer
• B. Facilitates an understanding of how information travels throughout a network
• C. Changes in one layer do not impact other layer
• D. Ensures reliable data delivery through its layered approach

Correct answer: A, B

Explanation

Options A and B are correct because the OSI model outlines the specific network functions at each layer and helps in understanding data flow across the network. Option C is incorrect as changes in one layer can indeed affect other layers, and option D is not accurate as the OSI model does not guarantee reliable data delivery; that is the role of protocols at higher layers.