OSI is broken down into layers. Each layer has a specific function and communicates and works with the layer below and above it. The OSI Model is conceptual, but its design enables both physical and virtual communication across a network. We’ll start with layer 7, which is the uppermost layer on the stack. Show
Layer 7 – The Application LayerLayer 7 is the layer most people are familiar with because it communicates directly with the user. An application that runs on a device might communicate with other OSI layers, but the interface runs on layer 7. For instance, an email client that transfers messages between client and server runs on layer 7. When a message is received on the client software, the application layer is what presents it to the user. Application protocols include SMTP (Simple Mail Transfer Protocol) and HTTP, which is the protocol for communication between browsers and web servers. Layer 6 – The Presentation LayerWe mentioned that the application layer displays information to users, but the presentation layer of the OSI model is what prepares data so that it can be displayed to the user. It’s common for two different applications to use encoding. For instance, communicating with a web server over HTTPS uses encrypted information. The presentation layer is responsible for encoding and decoding information so that it can be displayed in plaintext. The presentation layer is also responsible for compressing and decompressing data as it travels from one device to another. Layer 5 – The Session LayerTo communicate between two devices, an application must first create a session. A session is unique to the user and identifies them on the remote server. The session must be open long enough for data to be transferred but still closed after the transfer is complete. When large volumes of data are transferred, the session is responsible for ensuring that the file is completely transferred, and retransmission is established, should the data be incomplete. For instance, if 10MB of data is transferred and only 5MB completes, the session layer ensures that only 5MB is retransferred. This transfer makes communication over a network more efficient instead of wasting resources and transferring the entire file again. Layer 4 – The Transport LayerThe transport layer is responsible for taking data and breaking it up into smaller chunks. When data is transferred across a network, it is not transferred as one packet. To make transfers more efficient and faster, the transport layer breaks data into smaller segments. These smaller segments contain header information that can be reassembled at the target device. Segmented data also has error control to tell the session layer to reestablish a connection should packets fail to fully transfer to the target recipient. Layer 3 – The Network LayerThe network layer is responsible for breaking up the data on the sender’s device and reassembling it on the recipient’s device when the transmission is across two different networks. When communicating within the same network, the network layer is unnecessary, but most users connect to other networks, such as cloud networks. When data travels across different networks, the network layer is responsible for creating small data packets routed to their destination and then rebuilt on the recipient’s device. Layer 2 – The Data Link LayerThe network layer facilitates communication across different networks, but the data link layer is responsible for transferring information on the same network. The data link layer turns packets received from the network layer into frames. Just like the network layer, the data link layer is responsible for error control and flow to ensure successful transmission. Layer 1 – The Physical LayerJust as the name suggests, the physical layer is responsible for the equipment that facilitates data transfer, such as cables and routers installed on the network. This layer is one aspect of network transmission, where standards are essential. Without standards, transmission across different manufacturer devices is impossible. Question Description Solutions for In OSI model, when data is sent from device A to device B, the 5th layer to recieve data at B isa)Application layerb)Transport layerc)Link layerd)Session layerCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE). Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free. Here you can find the meaning of In OSI model, when data is sent from device A to device B, the 5th layer to recieve data at B isa)Application layerb)Transport layerc)Link layerd)Session layerCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of In OSI model, when data is sent from device A to device B, the 5th layer to recieve data at B isa)Application layerb)Transport layerc)Link layerd)Session layerCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for In OSI model, when data is sent from device A to device B, the 5th layer to recieve data at B isa)Application layerb)Transport layerc)Link layerd)Session layerCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of In OSI model, when data is sent from device A to device B, the 5th layer to recieve data at B isa)Application layerb)Transport layerc)Link layerd)Session layerCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice In OSI model, when data is sent from device A to device B, the 5th layer to recieve data at B isa)Application layerb)Transport layerc)Link layerd)Session layerCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests. When data is transmitted from device 1 to device 2 in an OSI model the header from 1 )' s 5th layer?Explanation: In TCP/IP model, the fifth layer is application layer. When data is sent from device A to device B, the 5th layer to receive data at B is application layer. Application layer provides the interface between applications and the network. The user interacts with only this layer.
When data is transmitted from device A to device B in an OSI model the header from A's 5th layer is read by B's?In the OSI model, when data is transmitted from device A to device B, the header from A's layer 5 is read by B's _______ layer. Explanation : None.
How data is transmitted at each layer of the OSI model?The presentation layer compresses the data and sends the message to the session layer, which opens a session for communication between the sender's device and the outgoing server. The message is sent to the transport layer where data is segmented, and then the network layer breaks the segments into packets.
When data are transmitted from device A to device B the header from as layer 4 is read by?When data are transmitted from device A to device B, the header from A's layer 4 is read by B's Transport layer.
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