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Topic: Presentation layer

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	Presentation layer - Wikipedia, the free encyclopedia
		The presentation layer is the sixth level of the seven layer OSI model.
		The presentation layer is responsible for the delivery and formatting of information to the application layer for further processing or display.
		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.
	en.wikipedia.org /wiki/Presentation_layer (329 words)

	THE PRESENTATION LAYER OF THE OSI MODEL
		The presentation layer is the sixth layer of the OSI model.
		The presentation layer of the OSI model at the receiving computer is also responsible for the conversion of “the external format” with which data is received from the sending computer to one accepted by the other layers in the host computer.
		So typically, in the presentation layer, the layout/structure of data in transit is set, language to be used in transmission is agreed on, security features are put in place to guarantee privacy and authentication, and the volume of data to be transmitted is decided through compression.
	homepages.uel.ac.uk /u0324781 (808 words)

	Organizing Presentation Logic
		Stacked against this, however, is the fact that separating the presentation logic does result in extra machinery to support the separation (the nature of which varies depending on which pattern you use.) As a result there's a rational argument in both directions, saying separation either simplifies or adds complexity to a presentation.
		The alternative style is Presentation Model which creates a form of model that captures all the data and behavior so that the view only needs a simple synchronization.
		In an application where the domain layer is on a separate process to the presentation you may want some domain logic running in the presentation process to make the application properly responsive.
	www.martinfowler.com /eaaDev/OrganizingPresentations.html (4093 words)

	ISO OSI 7 Layer Model forced with TCP/IP (Site not responding. Last check: 2007-11-06)
		It is the presentation layer that is also able to exchange messages and often dynamically create a syntax that is shared by it and its peer layer service on the remote stack.
		Other issues that are resolved by this layer include dealing with packet sized in the case of dissimilar settings, or protocols between networks forcing the size of a packet to become smaller before being passed on (called fragmentation in IP of the TCP/IP suite of protocols).
		This layer is not specified to have this.
	mike.passwall.com /networking/netmodels/isoosi7layermodel.html (7476 words)

	OSI Layer 6 - Presentation Layer (Site not responding. Last check: 2007-11-06)
		The last 3 layers of the OSI model are reffered to the "Upper" layers.
		There are no protocols which work specificly at the Presentation layer, but the protocols which work at the Application layer are said to work on all 3 upper layers.
		By providing translation services, the Presentation layer ensures that data transferred from the Application layer of one system can be read by the Application layer of another host.
	www.netcolony.com /clifford/osi_layer_6__presentation_layer.htm (259 words)

	ISO-PP: OSI Presentation Layer Protocol (X.226, X.216, ISO 8823, 8822)
		It does not identify the transfer syntax to be used while presentation data values are transferred between presentation entities, nor is it concerned with the local representation of presentation data values.
		The Presentation Layer exists to ensure that the information content of presentation data values is preserved during transfer.
		The OSI Presentation Layer protocol is defined in ISO (http://www.iso.org) documents 8823 and 8822 and ITU (http://www.itu.org) documents X.216, X.226.
	www.networkdictionary.com /protocols/pp.php (567 words)

	Seven Layer Model
		The number of layers should be large enough that distinct functions need not be thrown together in the same layer out of necessity, and small enough that the architecture does not become unwieldy.
		Layer 6 specifies whether it's a request for a GIF or an HTML document, and treats the Layer 7 header, data, and footer as its own data, prepending that with a header and appending it with a footer.
		The presentation layer provides a variety of encoding and encryption functions that are applied to the application layer data.
	networking.ringofsaturn.com /Protocols/sevenlayer.php (1739 words)

	Choosing the Right Presentation Layer Architecture (Site not responding. Last check: 2007-11-06)
		The presentation layer is a vitally important part of an application—an inappropriately architected presentation layer can lead to too much complexity, a lack of flexibility and an inefficient and frustrating user experience.
		The two commonly adopted approaches to presentation layer architecture and design are the thin client approach and the smart client approach.
		An application architected to use a smart client for its presentation layer will typically provide a central deployment server, from which the smart client artifacts can be deployed to the clients, and a number of Web services to provide access to the backend business capabilities—business logic and data—and which are consumed by the smart client.
	msdn2.microsoft.com /en-us/library/aa480039.aspx (6667 words)

	Presentation Integration (Site not responding. Last check: 2007-11-06)
		The Presentation Integration pattern is sometimes disparagingly called screen scraping because the middleware collects (or scrapes) the information from the information that is displayed on the screen during a user session.
		Presentation Integration is based on the interaction between the components that are described in Table 1.
		This layer is typically dependent on the specifics of the source application and may add to the brittleness of the solution.
	msdn2.microsoft.com /en-us/library/ms978588.aspx (1877 words)

	Webopedia: The 7 Layers of the OSI Model
		Control is passed from one layer to the next, starting at the application layer in one station, proceeding to the bottom layer, over the channel to the next station and back up the hierarchy.
		This layer provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control.
		Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing.
	www.webopedia.com /quick_ref/OSI_Layers.asp (426 words)

	The OSI Model, data link layer, 7 layer model
		This layer is resonsible for the ordering and reassembly of packets that may have been broken up to travel across certain media.
		Once the data from layer 2 has been received, layer 3 examines the destination address and if it is the address of its own end station, it passes the data after the layer 3 header to layer 4.
		The MAC layer concerns itself with the access control method and determines how use of the physical transmission is controlled and provides the token ring protocols that define how a token ring operates.
	www.rhyshaden.com /osi.htm (770 words)

	The TCP/IP Guide - Presentation Layer (Layer 6)
		More specifically, the presentation layer is charged with taking care of any issues that might arise where data sent from one system needs to be viewed in a different way by the other system.
		Another reason why the presentation layer is sometimes not mentioned is that its functions may be performed as part of the application layer.
		The fact that the translation job done by the presentation layer isn't always needed means that it is common for it to be “skipped” by actual protocol stack implementations.
	www.tcpipguide.com /free/t_PresentationLayerLayer6.htm (665 words)

	Presentation Layer (Linktionary term) (Site not responding. Last check: 2007-11-06)
		The presentation layer prepares incoming data for the application layer, where the user views the data.
		For outgoing data, the presentation layer translates data from the application layer into a form that is suitable for transfer over the network.
		There are various encoding rules built into the presentation layer protocols that handle all the data translations.
	www.linktionary.com /p/presentation.html (217 words)

	Presentation Layer (Site not responding. Last check: 2007-11-06)
		The presentation layer is concerned with the representation (syntax) of the data in the messages associated with an application during the transfer between two application processes.
		Presentation Layer Concepts and the ISO Presentation Layer.
		In the context of the OSI Reference Model, the most appropriate layer to perform such encryption is the presentation layer.
	ntrg.cs.tcd.ie /undergrad/4ba2/presentation (234 words)

	OSI Presentation Layer Concepts
		The Presentation layer deals with the syntax, or grammatical rules, needed for communication between two computers.
		The Presentation layer is so named because it presents a uniform data format to the Application layer.
		On the receiving end, the Presentation layer converts the machine-independent data from the network into the format required for the local system.
	www.measureup.com /testobjects/MS_NetEss/5a65ee2.htm (386 words)

	The Presentation Layer (Site not responding. Last check: 2007-11-06)
		The presentation layer performs certain functions that are requested sufficiently often to warrant finding a general solution for them, rather than letting each user solve the problems.
		The job of managing these abstract data structures and converting from the representation used inside the computer to the network standard representation is handled by the presentation layer.
		The presentation layer is also concerned with other aspects of information representation.
	www2.rad.com /networks/1994/osi/present.htm (236 words)

	What is the Presentation Layer?
		The Presentation Layer is layer six of the OSI model.
		The Presentation Layer resides above the Session Layer and below the Application Layer.
		The Presentation Layer is responsible for defining the syntax which two network hosts use to communicate.
	www.tech-faq.com /presentation-layer.shtml (387 words)

	OSI - Presentation (Site not responding. Last check: 2007-11-06)
		The Presentation layer, the sixth layer ensures the transfer of data regardless of how data is organized.
		This layer is responsible for the transfer of different data type that may not be compatible on different system.
		In another word, the Presentation layer is an interpreter, communicating in a language the reciever can understand.
	www.rit.edu /~wmb5704/409/midterm/presentation.htm (198 words)

	Network+ TechNotes: 7-Layer OSI Model
		When the bits stream arrives at the destination, the Physical layer takes it of the wire and converts it into frames, each layer will remove their corresponding header while the data flows up the OSI model until it is converted back to data and presented to the user.
		The Presentation layer 'represents' the data in a particular format to the Application layer.
		The Network layer converts the segments from the Transport layer into packets (or datagrams) and is responsible for path determination, routing, and the delivery of packets across internetworks.
	www.techexams.net /technotes/networkplus/osimodel.shtml (1441 words)

	ISO-PP: OSI Presentation Layer Protocol (X.226, X.216, ISO 8823, 8822)
		The OSI presentation layer protocol (ISO-PP) is for the information transit between open systems using connection oriented or connectionless mode transmission at the presentation layer of the OSI 7 layer model.
		The abstract syntaxes and the associated transfer syntaxes may be explicitly stated in the ?resentation context definition list?parameter as a user option.
		The OSIPresentation Layer protocol is defined in ISO (www.iso.org) documents 8823 and 8822 and ITU (www.itu.org) documents X.216, X.226.
	www.javvin.com /protocolISOpresentation.html (566 words)

	Chapter 11: The OSI Presentation Layer
		The overview of the chapter on page 11-2 shows that the Presentation Layer is concerned with translation of signals into formats network entities can understand.
		This layer must translate the way one entity does things to the way another does them when those entities are engaged in a network conversation:
		Think of the eight bits in the second byte as being an extension of the first byte, as if they were bits 8 through 15.
	home.att.net /~s.k.vincent/250_11.htm (823 words)

	m-Business Anywhere Application Edition: Technical FAQs - Sybase Inc
		This layer refers to source code, regardless of language, that controls the user interface through which end users view and manipulate data.
		This layer refers to the application code responsible for providing the main functionality of the application.
		This layer refers to the container of the application data and the software used to access it.
	www.sybase.com /detail?id=1027360 (1221 words)

	What is presentation layer? - a definition from Whatis.com
		- In the Open Systems Interconnection (OSI) communications model, the presentation layer ensures that the communications passing through are in the appropriate form for the recipient.
		For example, a presentation layer program may format a file transfer request in binary code to ensure a successful file transfer.
		An example of a program that generally adheres to the presentation layer of OSI is the program that manages the Web's Hypertext Transfer Protocol (HTTP).
	searchnetworking.techtarget.com /sDefinition/0,,sid7_gci212824,00.html (340 words)

	Presentation Layer Testing Thoughts
		In the MVP pattern, the presenter is an extension to the view, so all the interactions occuring in the view will be delegated to the presenter.
		The presenter can now use the mock view during automated testing and will not know a difference from the real thing.
		I am wondering if your problem here is this statement: "With the delgation to the presenter, we would only have to explicitly test the presenter." I think this statement could be the cause of your problem when you get to wiring up the real thing and your smoke test fails.
	geekswithblogs.net /afeng/archive/2006/07/05/84187.aspx (961 words)

	Presentation layer definition by The Linux Information Project
		The presentation layer, the second layer from the top in the seven-layer OSI (open systems interconnect) model, translates data from programs and protocols in the application layer above it to formats that can be transmitted over networks and used by other applications on other hosts.
		Although the presentation layer is concerned with data structure representation, compression and encryption, these activities are sometimes performed at other layers, each offering its own advantages and disadvantages.
		Examples of presentation layer protocols include ASCII (American standard code for information interchange), EBCDIC (extended binary coded decimal interchange code), MIDI (musical instrument digital interface), MPEG (moving picture experts group), SSL (secure sockets layer), TDI (tabbed document interface), TLS (transport layer security) and XDR (external data representation).
	www.bellevuelinux.org /presentation_layer.html (164 words)

	WCI General Web Architecture
		The presentation layer for early websites were built as CGI or Common Gateway Interface programs.
		The presentation layer is generally implemented inside a Web Server (like Microsoft IIS, Apache WebServer, IBM Websphere, etc.) The Web Server can generally handle requests for several applications as well as requests for the site's static webpages.
		The job of the data layer is to provide the business logic layer with required data when needed and to store data when requested.
	www.woodger.ca /archweb.htm (1261 words)

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