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Block 1 Unit 4
OSI Model
| Question | Answer |
|---|---|
| What is the International Organization for Standardization (ISO) most famous standard? | Open Systems Interconnection (OSI) model |
| Layers 1-4 of the OSI model are considered the WHAT layers, and mostly concern themselves with WHAT? | lower and moving data around. |
| What are the seven layers of the OSI reference model | Application, Presentation, Session, Transport, Network, Datalink, Physicals |
| The WHAT? layer of OSI reference model relates to the services that directly support user applications | APPLICATION |
| Encryption, decryption, and data compression is also typically done at this layer of the OSI reference model? | Presentation Layer |
| The OSI reference model layer that exchanges, and dialogues between the applications on each host is the WHAT layer? | Session |
| Which layer of the OSI reference model is responsible for end-to-end recovery, flow control and ensures complete data transfer? | Transport Layer |
| What layer of the OSI reference model is responsible for addressing packets and translating logical addresses and names into physical addresses? | Network |
| Which layer provides the functional and procedural means to transfers data between network entitles and may provide the means to correct errors | Layer 2 - Data Link |
| The WHAT? sub layer controls how a computer on the network gains access to the data and permission to transmit it. | Media Access Control (MAC) |
| The data link layer is divide into the WHAT? and ? layers? | Media Access Control (MAC) and Logical Link Control (LLC) |
| The WHAT? of the OSI reference model is responsible for the node to node delivery of the message. | Data link layer |
| The WHAT? represents the electrical and physical representation of the system? | Physical Layer |