Networking and Telecommunications
Networking and Telecommunications IST 220
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This 0 page Class Notes was uploaded by Ms. Jovany Will on Sunday November 1, 2015. The Class Notes belongs to IST 220 at Pennsylvania State University taught by Staff in Fall. Since its upload, it has received 13 views. For similar materials see /class/233017/ist-220-pennsylvania-state-university in OTHER at Pennsylvania State University.
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Date Created: 11/01/15
Chapter 1 OSI Model Abdullah Konak Scnuui urinrurmauun Sciences and Tecnnuiugy Penn State Berks Lemgn Vaiiey Learning Objectives I De ne the term protocol architecture and explain the need a ts ofa communication architectu e nd bene r CEallenge H Prnkssnr A MISS a Urdu k English nan lam at is a Protocol I Shared conventions and rules for com unicating information are called ro oco s I Allows entities ie application programs from different systems to commun39cat I Includes syntax semantics and timing I A protocol architecture consists ofa layered set of protocols y Use Layered Protocol Architecture I Breaks complex tasks into subtasks I Each module handles speci c subset oftasks I Communication occurs between different modules on the same s stem between similar modules on different systems I Easier application development I Network can change without all programs being modi ed Standardized Protocol Arcl tectll FelsW I Vendors like standards because they make their products more marketable I Customers like standards because they enable products from different vendors to interoperate I Two protocol standards are wellknovm PI widely implemente OSI wellknown less used still useful for modelingconceptualizing 051 and TCPIP Internet Protocol Architecture m architectures A Knnak I Open Systems Interconnection OSI Reference Model Still an excellent model for conceptualizing and understanding protocol I Transmission Control ProtocolInternet Protocol TCPIP OSI TCPIP Application A 1i t39 Pre entatinn PP ca 10 Session Transport Transport quot H quot Internet Network Network Data Link Access Physical Physical The upper levels The lower levels A Knnak o R ovides userinterface o Initiates services 0 Transfer data into standard format before transmission 0 Keeps data different applications data separate 0 Control the data exchange 0 Endtoend data error ee data transmission 0 Logical addressing for data packets Routing and error handling 0 NIC software function o How data encapsulation o Enordetection and collision prevention 0 Moves bits between devices 0 Speci es voltages cables and cables amaim mm Vehvou whammy m m m M o v V w 6quot quot HOSTA gzzmsw n mmquot n 5 mm m mam mum mam nmsmummm mum Mm d mum 0 11mm ammummmu mm Asnmmuaso am mm quotmm m mmmmumum mm muMm uwwu paw mmmwemWu mumVmpummu um um m wcmmu a mm mm mm gamma 5 5 me mm wvbmm WW mam a mum in m mnmmmhmuvm m mmme x mm Hamumhmdoenaxlauemilvmmlslm pm mmmmyalmmumamnmuspawn mm um m mam Eaclnmeunuale ewllva lkhwuwlv u Apphumnuw m Vesemamn ayy Frompremamn my I Th tra nzimo minir Presentation layer e presentation I nsaton transla puters encoding system to some international co Yo 53mm Layer ayer is responsible for ting data from the e39 i NM 3 L nownimimtaya quot 3 minimquot inquot From 53mm Layer A win Ymnwun Lays ess10n Layer l Tne SeSSiOi i iayerprovides tworw y communication bet ee w n nosts by estabiisning Synchronizing and terminating oonne From Vresemaion Lays Yo Vr nlalion taya 5mm mm Fromrransom Layer Transport Layer I Prepares data for transmission and provides a reliable mechanism for exchange of data between hosts 5 WWW m 5mm mm From Nawurk Lava A M yo Network Layer Eetwork Layer my I Network layer provides addressing and routing services across different types of networks me Yra39iwu LEI3 yo Yra39isv LEIEr Warmquot Mawquot From Data Link Layer re A Mm Baa Link Layer Data Link Layer l Provides errorcorrectlon and control SerCeS to the higher layers l FlamHg makes Sure that packets can travel different networks From Nawurk taya m Nawurk Layer mm nilr A M m Vhwml my mum mamMm mmal Lays I Transmits bits over a medium provides electrical and mechanical speci cations From Baa W Layer w Data W Lays mum um mmi iw