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17 Cards in this Set
- Front
- Back
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What comprises a segment and where does it appear on the OSI?
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TCP + Data
Transport Layer |
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What comprises a packet and where does it appear on the OSI?
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IP + TCP + Data
Internet Layer |
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What comprises a frame and where does it appear on the OSI?
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Link Header + Data + Link Trailer
Network Access Layer |
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What are the layers of the OSI 1-4?
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1 - Physical
2 - Data Link 3 - Network 4 - Transport |
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What are the layers of the OSI 5-7?
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5 - Session
6 - Presentation 7 - Application |
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What are the layers of the TCP/IP reference model?
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1 - Network Access (Data link/Physical in OSI)
2 - Internet 3 - Transport 4 - Application |
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What phrase allows you to memorize the OSI model layers?
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Pew! Dead Ninja Turtles Smell Particularly Awful
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In the OSI what does Layer 1 do?
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Standards that deal with the physical characteristics of the transmission medium, including connectors, pins, use of pins, electrical currents, encoding, light modulation, and rules for how to activate and deactivate.
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In the OSI what does Layer 2 do?
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Data Link Layer - defines protocols that determine when a device can send data over a particular medium. Also define the format of a header/trailer. Trailer has Frame Check Sequence (FCS) which allows for receiver to detect errors.
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In the OSI what does Layer 3 do?
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3 main features:
1) Logical addressing 2) Routing (forwarding) - to final dest. 3) Path determination - best path |
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In the OSI what does Layer 4 do?
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Focuses on issues related to data delivery - error recovery & flow control
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In the OSI what does Layer 5 do?
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Establish & maintain end-to-end bidirectional flows between endpoints. Includes managing transaction flows.
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In the OSI what does Layer 6 do?
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Define and negotiate data formats. Includes encryption.
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In the OSI what does Layer 7 do?
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Interface between network and application software. Also authentication.
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What are the six (6) benefits of using the OSI?
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1. Less complex
2. Standard interfaces 3. Easy to learn 4. Easy to develop 5. Multivendor interoperability 6. Modular engineering |
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What is a same-layer interaction in the OSI model?
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Two computers use a protocol to communicate with the same layer on another computer.
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What is an adjacent-layer interaction in the OSI model?
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On a single computer, one layer provides a service to another layer.
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