Iso osi 7 layer network architecture ppt. Osi Model : 7 Layer Of The Network Communication

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The Seven Layers of OSI Model

iso osi 7 layer network architecture ppt

This requires some sort of naming mechanism so that a process on one machine can indicate with whom it wants to communicate. Congestion Control: A router can be connected to 4-5 networks. Frames provide us sending the data in a sequence. Layers 1,2 and 3- physical, data link and network are the network support layers; they deal with the physical aspect of moving data from one device to another. Most of the process which is made at Data Link Layer is processed on network cards.

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The Seven Layers of OSI Model

iso osi 7 layer network architecture ppt

By using the checksum, we can find out whether the payload has been damaged during transfer. On sending computer, it converts digital signals received from the Data Link layer, in analog signals and loads them in physical media. The transmission of the bits is not completely reliable as their is no error correction in this layer. Transport Layer It decides if the transmission is to take place in parallel or a single path. A connectionless transport layer treats each segment as an independent packet and delivers it to the transport layer at the destination machine.

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The OSI Model

iso osi 7 layer network architecture ppt

VenkateshChinnasamy Network Layer : Network Layer The Network layer is responsible for the source-to-destination delivery of a packet possible across multiple networks. But after years , many vendors started to develop their own devices too. VenkateshChinnasamy PowerPoint Presentation : Reliable process-to-process delivery of a message VenkateshChinnasamy Functions of the transport layer : Functions of the transport layer Port addressing:computer often run several processes running programs at the same time. In this case, the basic transmission unit is the segment that is composed of a header and payload. A connection-oriented transport layer makes a connection with the transport layer at the destination machine first before delivering the packets.

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OSI Network Architecture (7 layer model)

iso osi 7 layer network architecture ppt

This segmentation provides the receiver device can get the information with the right sequence. Connection less service is modeled after the postal system. Routing: This deals with determining how packets will be routed transferred from source to destination. Internet Protocol is also equipped with a Network layer. Provide user interface to send and receive the data. There can be several transport connections between two computers at any given time for example, one for a virtual terminal and another for email. It helps in the transmission of data between two machines that are communicating through a physical medium, which can be optical fibres,copper wire or wireless etc.

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OSI LAYERS ppt

iso osi 7 layer network architecture ppt

A serial port or an Ethernet card can serve as a link interface. There are no reliability guarantees. It became an industry standard very quickly. Multiplexing Through the use of port numbers, this layer also provides connection multiplexing. Main difference between a connection-less and connection-oriented protocol is that a connection-oriented protocol provides reliable data delivery. A serial port or an Ethernet card can be used as a network interface. Application Layer The application layer defines the format in which the data should be received from or handed over to the applications.

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OSI Model

iso osi 7 layer network architecture ppt

This requires some sort of naming mechanism so that a process on one machine can indicate with whom it wants to communicate. On receiving computer, it joins all segments back in data stream. The service may be perfectly reliable, or may be reliable within certain tolerances or may not be reliable at all. It was designed to establish, maintain, and synchronize the interaction between communicating devices. By following these standards, they can build the networking components and software applications which work in dissimilar environments.

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OSI Model And 7 Layers Of OSI Model Explained

iso osi 7 layer network architecture ppt

The message may or may not be received in the order in which it was sent. The decision regarding the type of service to be provided is taken at the time when the connection is established. The decision regarding the type of service to be provided is taken at the time when the connection is established. For each individual request, it uses a separate session. Connection oriented service is modeled after the telephone system. Everything related to signals is handled here including transmission of digital bits as electronic signals. The error control is on link to link basis.

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Osi Model : 7 Layer Of The Network Communication

iso osi 7 layer network architecture ppt

To understand the above concept, we can also draw an analogy from the real life. This layer assures the transmissoin of each bit with a high probability. In this layer picture formats like jpg, png etc. It provides error control mechanism on end to end basis. However, if the two systems are attached to different networks, there is often a need for the network layer to accomplish source-to-destination delivery. When an application makes a network request, this layer checks whether the requested resource is available in local system or in remote system.

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OSI Seven Layers Model Explained with Examples

iso osi 7 layer network architecture ppt

Layer 4 the transport layer ensure reliable data transmission. It helps in the transmission of data between two machines that are communicating through a physical medium, which can be optical fibres,copper wire or wireless etc. For example, on the coppar wire medium, we can use differnet voltage levels for a certain time interval to represent '0' and '1'. A data frame is composed of a header, payload, and trailer. Applications use unique addresses within one computer, so the transport address is usually composed of both the network and transport addresses. Routing The network layer is responsible for the delivery of packets from the original source to the final destination.

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