tcn 4081 project 1 group 1

tcn 4081 project 1 group 1



hi little talk today about OSI and TCB I'll be at Moodle the first thing it's Network model that's a method of description and analysis data communication that works by rating than the entire set of communication process into a number of players each player has a specific function first think it's the OSI model its international standard organization noise known as iso 12 – in 1977 to develop for the system for system communication the open system interconnection and it's known OSI that the first model is the result of the effort this model allows any two different systems to communicate it regardless of their underlining architecture however the OSI model describes how data flows from one computer to a network to another computer the OSI model is not protocol it is a model for understanding any design designing a network architecture that is flexible and reports abused the OSI model consists of seven separated but related layers each of which defines about of the progress of moving confirmation at cross and at work there are these are the seven layers the first one its physical second one Data Link Network transport season presentation and the last one its application there is one two three data link and network our network support layers layer for the transport sub layer thanks to some groups there is five six seven seasons presentation and application how users support laters physical layer physical layer is the bottom layer as I model it as a responsible for the actual physical connection between the devices the physical layer is responsible for mobile our movements of individual bits from one not to next now the functions of physical layers we often 10 functions of the whisker are the first ones comport with singles with the ionization Manas physical connection with white control line configuration physical topology and transmission mode multiplexing is switching now the data link layer they were swung the right from the physical layer to the not from network layer to the visual layer then the data link layer was responsible for moving right crumbs from one node to the next none of the functions of the datalink layer the best ones forming divides the data from and – wo layer onto frames the second ones the physical Data Sync ID header to the frame to define the virtual address of the source and destination machine the third one is the flow control it is the topic regality we can mechanism implemented by datalink they are the prevents the bartender from drawing the slow receive receiver the forth once the error control provides that mission is mission ism of error control and which is dicts and arrangements damaged or lost frames the last Wednesday feedback after montage do you think the frames the system where's for the feedback the functions of a network layer that is the responsible for the source to destination delivery of packets across multiple networks parting provide we can listen to transmit data of warranty when did networks that are linking together logical a distinct I dislodge card a single sender and receiver CNT the transport layer provides two types of services the best ones connection-oriented transmission and this type of transmission the receiving device since unanalyzed meant back to the source after the bucket or a globe of bucket shipped the second one is the connections connects lease transmission and this type of transmission that silver does not analyte received a bucket here are the function of each transport transport layer segmentation and reassembly divided the message received from session layer and to segment and number them to make a sequence of assembly at receiving site surface point addressing transport layer makes sure that the message is delivered to the correct process on destination machine error control make sure that the entire message arrives without arabs else retransmit flu control transport layer makes sure that the sender session layer from Britain presentation layer to transport layer from transport layer to presentation layer it is assembly prom it is responsible for beginning maintaining and ending the communication between two devices which is called session functions of session layer its establishment maintaining and sin and ending a session since as yn packet established request received a CK and sy n established – and sender sent ACK dialogue control the session layer allows to system to enter into dialogue synchronization I know allows a process to add checkpoints to a stream of data from application layer to session layer from session layer to application layer this layer is concurred with the syntax and semantics of the information exchange between two systems function of a presentation layer data translation encoding and decoding sender to common format on sending side common to receiving format on receiver side data encryption for security and privacy purpose data compression data compression reduces the number of bytes contained contained in the information so application layer as we can see the transferred from user to X 412 7 data to present a presentation layer and the opposite from presentation layer to user layer provides user interface and support for service like mail and file transfer function of application layer network virtual terminal it allows a user to log in to a remote host network file transferred access and management this application allow a user to access files and remote host martha mail services this application provide very various email service dictionary service this application provides the distribution database source and axis for global information about viruses object and services TSP – IP model TSP forms database of present-day internet TCP and IP are two protocols of this model this model was intentionally used by our peanuts the TCP and IP protocol suits was defined as having four letters the first layer was host to network the second one is Internet the third one is transport the for the first one has applications similar the similarities between OSI and tcp/ip both are based on the concept of stacks of independent particles punctuality of players is roughly similar up to transport network oriented above the user oriented also difference between OSI and tcp/ip Louis a model has several layers tcp/ip has four layers also models provide clear this distance between service interface and protocols TCP IP doesn't provide clearly distinguish between services interface and article an oversight model transport layer and is connected oriented and tcp/ip transport layer is both connected oriented and connected and connectedness and thank you

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