CyberCertPrepSecurity FundamentalsNetworking FundamentalsEASYFree question
How does the TCP/IP model differ from the OSI model?
- A.They are identical
- B.TCP/IP doesn't have a Transport layer, and the physical layer is responsible for logical addressing and for choosing the route a packet takes, while the network layer only encodes voltage transitions onto the medium, and neither layer exchanges any information with the other because each terminates an independent session with the remote host
- C.TCP/IP has more layers than OSI
- D.The TCP/IP model has 4 layers (Network Access, Internet, Transport, Application) compared to OSI's 7 layers - TCP/IP combines OSI's Physical and Data Link into Network Access, and merges Session, Presentation, and Application into a single Application layer. TCP/IP is the practical model used on the internet
Why D is correct
TCP/IP model: Network Access (OSI 1+2), Internet (OSI 3), Transport (OSI 4), Application (OSI 5+6+7). TCP/IP is the practical implementation (actual internet protocols). OSI is the theoretical reference model. Both useful for understanding networking concepts.
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