Term
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Definition
Physical - Bit Stream at Mechanical / Electrical Level
Data Link - Error control, physical addressing, flow control, data is in bits
Network - Routing, node to node
Transport - host to host. flow control,
Session - Connections between applicaions
Presentation - data representation and encryption ( for application layer)
Application - Application specific. Interacts with operating system |
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Term
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Definition
Physical - Signal rate and encoding
Network Access - Logical interface between system and end network
Internet - Routing of Data across Multiple Networks
End to End / Transport - End -to End (TCP / UDP)
Application - Communication between apps
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Term
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Definition
| Nonrandom. The decay of the signal strength as it travels through the medium. The dependence of attenuation amount on frequency. |
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Term
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Definition
| The dependence of propagation velocity through a guided medium on frequency. |
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Term
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Definition
| Random. Due to random movement of thermally agitated electrons. |
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Term
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Definition
| Signals that are the sum and difference of original frequencies. |
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Term
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Definition
| A signal from one line is picked up by another |
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Term
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Definition
| Irregular pulses or spikes (ie, external electromagnetic interference) |
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Term
| Digital data, digital signal |
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Definition
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Term
| Digital data, analog signal |
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Definition
| ASK, BFSK, BPSK, MFSK, MPSK, QAM |
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Term
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Definition
Data represented by changes rather than
levels. |
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Term
| analog data, digital signal |
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Definition
| PCM (Pulse Code Modulation) DCM (Delta Modulation) [sampling] |
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Term
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Definition
| Data to be transmitted to user (next layer up) |
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Term
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Definition
| Supervisory Frame - Controls ACKs and NAKs |
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Term
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Definition
| Unumbered - Link Management |
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Term
| number of control bits used HLDC |
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Definition
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