OSI LAYERS(OPEN SYSTEMS INTERCONNECTION ) Betül ŞAHİN - 21001525.

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OSI LAYERS(OPEN SYSTEMS INTERCONNECTION ) Betül ŞAHİN

VIDEO TIME Betül ŞAHİN OSI LAYERS ANIMATION:

OSI LAYERS Betül ŞAHİN

PHYSICAL The physical layer of the OSI model defines connector and interface specifications, as well as the medium (cable) requirements. Electrical, mechanical, functional, and procedural specifications are provided for sending a bit stream on a computer network. Betül ŞAHİN

DATA-LINK Layer 2 of the OSI model provides the following functions: Allows a device to access the network to send and receive messages Offers a physical address so a device’s data can be sent on the network Works with a device’s networking software when sending and receiving messages Provides error-detection capability Betül ŞAHİN

NETWORK Layer 3 the network layer of the OSI model, provides an end-to-end logical addressing system so that a packet of data can be routed across several layer 2 networks (Ethernet, Token Ring, Frame Relay, etc.). Note that network layer addresses can also be referred to as logical addresses. Betül ŞAHİN

TRANSPORT Layer 4, the transport layer of the OSI model, offers end-to-end communication between end devices through a network. Depending on the application, the transport layer either offers reliable, connection-oriented or connectionless, best-effort communications. Betül ŞAHİN

APPLICATION Layer 7, the application layer, provides an interface for the end user operating a device connected to a network. This layer is what the user sees, in terms of loading an application (such as Web browser or e- mail); that is, this application layer is the data the user views while using these applications.