| Question | Answer |
| Layer 1 | Physical |
| Layer 2 | Data Link |
| Layer 3 | Network |
| Layer 4 | Transport |
| Layer 5 | Session |
| Layer 6 | Presentation |
| Layer 7 | Application |
| Physical Layer Function | Physical Topology |
| Data Link Layer Function | Framing |
| Network Layer Function | Routing |
| Transport Layer Function | End-to-end connection |
| Session Layer Function | Dialog Control |
| Presentation Layer Function | Data encryption, compression, & translation services |
| Application Layer Function | File, print, message, database, & application services |
| Physical Layer Responsibility(ies) | ~Moves bits between devices ~Specifies voltage, wire speed, & pin-out of cables |
| Data Link Layer Responsibility(ies) | ~Combines packets into bytes, and bytes into frames ~Provides access to media using MAC address ~Performs error detection, not correction |
| Network Layer Responsibility(ies) | ~Provides logical addressing which routers use for path determination |
| Transport Layer Responsibility(ies) | ~Provides reliable or unreliable delivery ~Preforms error correction before re-transmit |
| Session Layer Responsibility(ies) | ~Keeps different applications' data separate |
| Presentation Layer Responsibility(ies) | ~Presents data ~Handles processing such as encryption |
| Application Layer Responsibility(ies) | ~Provides a user interface |
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