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| Pregunta | Respuesta |
| Open Systems Interconnection (OSI) reference model | Developed by the International Organization for Standardization (ISO) IN 1977 to aid understanding of how a network system functions in terms of both the hardware and software components. |
| TCP/IP Protocol Suite | A four-layer conceptual model also called ARPA or DoD model |
| Link Layer / Network Interface | Equivalent of the OSI physical and data link layers as it defines the host’s connection to the network. |
| Internet Layer (Internetwork Layer) | Provides addressing and routing functions. It uses a number of protocols (notably the Internet Protocol [IP] and Address Resolution Protocol [ARP]) to ensure the delivery of packets. |
| Transport Layer | Provides communication between the source and destination computers and breaks application layer information into segments. TCP/IP provides two methods of data delivery: 1. Connection-oriented using TCP 2. Connectionless using UDP. |
| Application Layer | Layer at which most TCP/IP services (high level protocols such as FTP, HTTP and SMTP) are implemented. |
| Network Boundaries |
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