Chat Layer
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The Session Layer is Layer 5 of the seven-layer OSI model of computer networking. It provides mechanisms for opening, closing, and managing sessions between end-user application processes, allowing for semi-permanent dialogues. Session Layer services are commonly used for remote procedure calls and provide full or half-duplex communication with synchronization points. Examples of Session Layer protocols include the OSI Session Layer Protocol, Zone Information Protocol for AppleTalk, and Session Control Protocol for DECnet.
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![Session Layer From Wikipedia, the free encyclopedia Jump to: navigation , search "Layer 5" redirects here. For the political layer sometimes included in the TCP/IP model , see Layer 8 . The Session Layer is Layer 5 of the seven-layer OSI model of computer networking . The Session Layer provides the mechanism for opening, closing and managing a session between end-user application processes, i.e. a semi-permanent dialogue. Communication sessions consist of requests and responses that occur between applications. Session Layer services are commonly used in application environments that make use of remote procedure calls (RPCs). An example of a Session Layer protocol is the OSI protocol suite Session Layer Protocol, also known as X.225 or ISO 8327. In case of a connection loss this protocol may try to recover the connection. If a connection is not used for a long period, the Session Layer Protocol may close it and re-open it. It provides for either full duplex or half-duplex operation and provides synchronization points in the stream of exchanged messages. [1] Other examples of Session Layer implementations include Zone Information Protocol (ZIP) – the AppleTalk protocol that coordinates the name binding process, and Session Control Protocol (SCP) – the DECnet Phase IV Session Layer protocol. Within the service layering semantics of the OSI network architecture, the Session Layer responds to service requests from the Presentation Layer and issues service requests to the Transport Layer .](https://image.slidesharecdn.com/chatlayer-090617232558-phpapp02/85/Chat-Layer-1-320.jpg)
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Please help!!!I can change a link layer protocol and the applicati.pdf
Please help!!!
I can change a link layer protocol and the application layer protocol does not need to know or be
made aware of the change. Explain why?
Solution
Answer :-
The protocols are like a pile of building blocks stacked one upon another. Because of this
appearance, the structure is often called a stack or protocol stack.
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Application Layer.
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2) Presentation Layer :-
For cooperating applications to exchange data, they must agree about how data is represented. In
OSI, the Presentation Layer provides standard data presentation routines. This function is
frequently handled within the applications in TCP/IP, though TCP/IP protocols such as XDR and
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3) Session Layer :-
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The document provides an overview of the OSI model and TCP/IP protocols. It describes the seven layers of the OSI model from the physical layer to the application layer. It then explains the five layers of the TCP/IP model and how encapsulation works. The document also covers topics such as addressing, fragmentation, segmentation, and IP addressing and subnetting.
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The document discusses the OSI model and TCP/IP protocol suite. It describes the seven layers of the OSI model and compares it to the TCP/IP model. Each layer is responsible for certain functions in the communication process. The physical layer deals with physical interfaces, data link layer handles framing and addressing, network layer provides logical addressing and routing, transport layer handles segmentation and error checking, session layer manages dialog control and synchronization, presentation layer handles data formatting, and application layer supports user applications and services. The document also discusses addressing mechanisms used at each layer like physical, logical, port, and application-specific addresses.
osi-tcp.ppt
The document provides an overview of the OSI model and TCP/IP model. It describes:
- The 7 layers of the OSI model from physical to application layer and their functions.
- A brief history of the development of the OSI model.
- An introduction to the TCP/IP model and its layers, which are similar but not identical to the OSI layers.
- Some arguments that strict layering can be considered harmful, as it increases complexity and separation of optimizations between layers.
osi-tcp ppt 1.pptx........................
The document provides an overview of the OSI model and TCP/IP model. It describes the 7 layers of the OSI model from the physical layer to the application layer. It then discusses the history and development of OSI. It also explains the layers of the TCP/IP model and how it maps to the OSI layers. Finally, it discusses arguments for why strict layering may be considered harmful, as it can increase complexity and violate the simplicity principle.
OSI and TCP/IP Model
The document provides information on the OSI model and TCP/IP model, which are reference models for network communication. The OSI model has 7 layers - physical, data link, network, transport, session, presentation, and application layer. The TCP/IP model has 4 layers - network access, internet, transport, and application layer. Each layer has a specific function, with lower layers dealing with physical delivery of data and higher layers dealing with end-to-end connections and application-specific tasks.
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Chat Layer
- 1. Session Layer From Wikipedia, the free encyclopedia Jump to: navigation , search "Layer 5" redirects here. For the political layer sometimes included in the TCP/IP model , see Layer 8 . The Session Layer is Layer 5 of the seven-layer OSI model of computer networking . The Session Layer provides the mechanism for opening, closing and managing a session between end-user application processes, i.e. a semi-permanent dialogue. Communication sessions consist of requests and responses that occur between applications. Session Layer services are commonly used in application environments that make use of remote procedure calls (RPCs). An example of a Session Layer protocol is the OSI protocol suite Session Layer Protocol, also known as X.225 or ISO 8327. In case of a connection loss this protocol may try to recover the connection. If a connection is not used for a long period, the Session Layer Protocol may close it and re-open it. It provides for either full duplex or half-duplex operation and provides synchronization points in the stream of exchanged messages. [1] Other examples of Session Layer implementations include Zone Information Protocol (ZIP) – the AppleTalk protocol that coordinates the name binding process, and Session Control Protocol (SCP) – the DECnet Phase IV Session Layer protocol. Within the service layering semantics of the OSI network architecture, the Session Layer responds to service requests from the Presentation Layer and issues service requests to the Transport Layer .