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| capa de servicio | |||
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| nivel de servicios (The layer that functions as a gateway between the client layer and the platform layer, where the data resides. The services layer provides three functions: provisioning, billing and metering, and connection routing) | |||
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service layer : 12 a las frases, 2 temas |
| Comunicaciones | 8 |
| General | 4 |