The presentation layer is the sixth level of the seven layer OSI model. It responds to service requests from the application layer and issues service requests to the session layer. It has been suggested that this article or section be merged with Open Systems Interconnection. ... The application layer is the 7 th seventh level of the seven-layer OSI model. ... The session layer is level five of the seven level OSI model. ... In computing and telecommunications, the transport layer is layer four of the seven layer OSI model. ... The network layer is level three of the seven level OSI model. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... According to the IEEE 802 family of standards, Logical Link Control (LLC) is the upper sublayer of the OSI data link layer. ... media access control is where people try to access a control to the media. ... The physical layer is level one in the seven level OSI model of computer networking as well as in the five layer TCP/IP reference model. ... It has been suggested that this article or section be merged with Open Systems Interconnection. ... The application layer is the 7 th seventh level of the seven-layer OSI model. ... The session layer is level five of the seven level OSI model. ...

The presentation layer is responsible for the delivery and formatting of information to the application layer for further processing or display. It relieves the application layer of concern regarding syntactical differences in data representation within the end-user systems. Note: An example of a presentation service would be the conversion of an EBCDIC-coded text file to an ASCII-coded file. In general, data consist of propositions that reflect reality. ... EBCDIC (Extended Binary Coded Decimal Interchange Code) is an 8-bit character encoding (code page) used on IBM mainframe operating systems, like z/OS, OS/390, VM and VSE, as well as IBM minicomputer operating systems like OS/400 and i5/OS. It is also employed on various non-IBM... A computer file is a collection of information that is stored in a computer system and can be identified by its full path name. ... There are 95 printable ASCII characters, numbered 32 to 126. ...

The presentation layer is the first one where people start to care about what they are sending at a more advanced level than just a bunch of ones and zeros. This layer deals with issues like how strings are represented - whether they use the Visual Basic method ("13,thisisastring") or the C/C++ method ("thisisastring0"). The idea is that the application layer should be able to point at the data to be moved, and the Presentation layer will deal with the rest. Visual Basic (VB) is an event driven programming language and associated development environment from Microsoft. ... Wikibooks has a book on the topic of C Programming The C programming language (often, just C) is a general-purpose, procedural, imperative computer programming language developed in the early 1970s by Dennis Ritchie for use on the Unix operating system. ... C++ (generally pronounced ) is a general-purpose, high-level programming language with low-level facilities. ...

Encryption is typically done at this level too, though it can be done at the application, session, transport, or network layer; each having its own advantages and disadvantages. Another example is representing structure, which is normally standardised at this level, often by using XML. As well as simple pieces of data, like strings, more complicated things are standardised in this layer. Two common examples are 'objects' in object-oriented programming, and the exact way that streaming video is transmitted. // In cryptography, encryption is the process of obscuring information to make it unreadable without special knowledge. ... The application layer is the 7 th seventh level of the seven-layer OSI model. ... The session layer is level five of the seven level OSI model. ... The network layer is level three of the seven level OSI model. ... The Extensible Markup Language (XML) is a W3C-recommended general-purpose markup language for creating special-purpose markup languages, capable of describing many different kinds of data. ... This article is becoming very long. ... Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images which represent scenes in motion. ...

In many widely used applications and protocols, no distinction is made between the presentation and application layers. For example, HTTP, generally regarded as an application layer protocol, has presentation layer aspects such as the ability to identify character encodings for proper conversion, which is then done in the application layer. Hypertext Transfer Protocol (HTTP) is a method used to transfer or convey information on the World Wide Web. ...

Examples

• AFP, AppleShare File Protocol
• LPP, Lightweight Presentation Protocol
• NCP, NetWare Core Protocol
• NDR, Network Data Representation
• XDR, eXternal Data Representation
• X.25 PAD, Packet Assembler/Disassembler Protocol
• ICA Citrix Systems Core Protocol][1]