Data Link
The data link layer provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the physical layer
1. Physical Layer - Defines the electrical and physical specifications for devices.
2. Data Link Layer - Provides the functional and procedural means to transfer data between network entities. It also detects and possibly correct errors that may occur in the Physical Layer.
3. Network Layer - Transfers variable length data sequences from a source to destination through one or more networks while also maintaining a quality of service requested by the Transport Layer.
4. Transport Layer - Provides transparent transfer of data between end users, providing reliable data transfer services to the upper layers.
5. Session Layer - Controls the connections between computers. It establishes, manages, and terminates the connections between the local and remote application.
6. Presentation Layer - Establishes a context between the Application layer entities in which the high-layer entities can use different syntax and semantics.
7. Application Layer - Provides a user interface that enables user to access the network and applications.
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