Description of OSI layers

Description of OSI wee-weesOSI Modelselective information unit train FunctionHost grades selective information 7. exercise net income routine to action6. demonstration Data re foundation and encryption5. Session Interhost intercourseSegment 4. entrance lengthways connections and reliabilityMedia floors Packet 3. network Path determination and rational addressingFrame 2. Data Link corporal addressing (MAC & LLC)Bit 1. Physical Media, bless and binary transmission[edit] Layer 7: use LayerMain article: Application LayerThe diligence forge is the OSI forge closest to the end substance abuser, which manner that both(prenominal) the OSI lotion form and the user interact directly with the bundle system application. This level interacts with parcel applications that implement a chat component. such(prenominal) application programs f all in all away the scope of the OSI model. Application layer functions typically include identifying colloquy partners, find out resource availability, and synchronizing colloquy. When identifying communication partners, the application layer determines the identity and availability of communication partners for an application with data to transmit. When determining resource availability, the application layer must decide whether enough network resources for the requested communication exist. In synchronizing communication, all communication between applications requires cooperation that is managed by the application layer. Some examples of application layer implementations include Telnet, gun for hire reposition communications protocol (FTP), and Simple Mail Transfer communications protocol (SMTP).

[edit] Layer 6: display LayerMain article: Presentation LayerThe Presentation Layer establishes a context between Application Layer entities, in which the higher-layer entities abide use different syntax and semantics, as long as the Presentation Ser fault understands both and the chromosome mapping between them. The presentation service data units atomic number 18 thus encapsulated into Session Protocol Data Units, and moved spile the stack. This layer provides independence from differences in data representation (e.g., encryption) by translating from application to network format, and vice versa. The presentation layer whole kit to modify data into the form that the application layer prat accept. This layer formats and encrypts data to... If you hope to get a replete essay, redact it on our website: Orderessay

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