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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
What is the purpose of the OSI Model?
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OSI reference model is a means of describing how data is transmitted over a network, and the model addresses hardware, software and data transmission.
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The OSI Reference Model 1-28
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What are the 7 layers of the OSI model?
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7: Application, 6: Presentation, 5:Session, 4:Transport, 3:Network, 2:Data Link, 1:Physical
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All People Seem To Need Data Processing
<A.P.S.T.N.D.P. Acronym> |
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What is the FUNCTION of layer 1 in the OSI Model?
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Binary Transmission:
-Defines the electrical, mechanical, procedural and functional specification for activating maintaining and deactivating the physical link. |
Physical Level
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What is the FUNCTION of layer 2 in the OSI model?
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Access to Media:
-Defines how data is formatted for transmission and how access to the network is controlled. -It also provides ERROR DETECTION. |
Data Link Level
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What is the FUNCTION of layer 3 in the OSI model?
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Data Delivery:
-Routes Data Packets -Selects best path to deliver data -Provides logical addressing and path selection |
Network Level
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What is the FUNCTION of layer 4 in the OSI model?
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End-to-End Connections:
-Handles transportation issues between hosts (computers) -Ensures data transport reliability. -Established, maintains and terminates virtual circuits. -Fault detection and recovery information flow control. |
Transport Level
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What is the boundary between the Transport level and Session level of the OSI model thought of?
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The boundary between application protocols and data-flow protocols.
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<no hint here>
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What is the FUNCTION of layer 5 in the OSI model?
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Interhost Communication:
-Establishes, manages and terminates sessions between applications. |
Session Level
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What is the FUNCION of layer 6 in the OSI model?
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Data Representation:
-Ensures data is readable by receiving host -Formats data -Structures data -Negotiates data transfer syntax for application level -Provides encryption |
Presentation Level
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What is the FUNCTION of layer 7 in the OSI model?
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Network Processes to Applications
-Provides network services to application processes (email, file transfers, terminal emulation) -Provides user authentication |
Application Level
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What is Encapsulation?
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Encapsulation wraps data with the necessary protocol information before network transit.
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Level 7 to 1 of OSI model. Data Flow.
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What is De-Encapsulation?
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Receiving host receives a sequince of bits, the physical layer passes the bits to data link for manipulation.
Translates the protocol from the sending unit (encapsulation) |
Reverse Encapsulation
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What is Peer-to-Peer communication?
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Each level of the OSI model talks directly from sending host to receiving host on a level to level basis. (sending host Transport talks to receiving host Transport)
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Person to Person style...
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What are Network Protocols?
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Network Protocols are sets of rules and standards that tell the services of a network what to do. Each has its own function and operation at different layers of the OSI model.
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Laws of Network Protocol
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What defines the network functions that occur at each layer and ficilitates an understanding of how information travels thrughout a network?
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The OSI reference model
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Purpose of topic.
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