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Cisco Certified Network Associate (CCNA) · Cisco
Select 2 answers.
This question asks for 2 answers, but our data marks only 1. Compare with the community discussion below for the full answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
A is correct because the OSI model breaks down network functions into seven standardized layers, each with specific roles. B is correct because the OSI model helps visualize and understand the flow of data across a network. C is misleading. while the model promotes layer independence, in practice, changes in one layer can affect others. (Remember: the OSI model is not used in actual networks!) D is incorrect. the OSI model itself doesnt guarantee reliable delivery; that’s a function of protocols like TCP at Layer 4.
For me, A seems wrong since you are not defining network functionality at layers 1 and 2. D on the other hand ensures reliable data is being transmitted since you are troubleshooting through the different layers. Strange question.
Unsure about option C as it definitely impacts another layer .