CyberCertPrepSecurity FundamentalsNetworking FundamentalsEASYFree question
How many layers does the OSI model have and what is the correct order from bottom to top?
- A.7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application
- B.5 layers: Physical, Network, Transport, Session, Application
- C.6 layers: Physical, Data Link, Network, Transport, Session, Application
- D.4 layers: Network Access, Internet, Transport, Application
Why A is correct
The OSI (Open Systems Interconnection) model has 7 layers: 1-Physical, 2-Data Link, 3-Network, 4-Transport, 5-Session, 6-Presentation, 7-Application. Mnemonic: 'Please Do Not Throw Sausage Pizza Away.'
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