Which layers of the OSI reference model are host-to-host layers?
Answer is [a] : Application layer, Presentation layer, Session layer, Transport Layer.
Transport, Session ,Presentation nd Application layer are actually Host to Host Layer.
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Exclude Network Layer bcz below diagram is TCP/IP not for OSI.
network layer is host to host,but here network layer and above are not given so better choosing A. Actually transport layer is end to end but as network is not provided so we chose A.