Height Speed Network.pdf - Height Speed Network Protocols...

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Height Speed Network Protocols and TechnologiesrX.25rAsynchronous Transfer Mode (ATM)rFRAME RELAYrSLIPrPPP1
X.25r1976rInterface between host and packet switched networkrوانولازم(packet) واﺿفrAlmost universal on packet switched networks and packet switching in ISDNrتولازموولازم(packet) لمرﺑًﺎISDNrDefines three layersmPhysicalmLinkmPacket2
X.25 - PhysicalrInterface between attached station and link to noderاواناطاوارطدةrData terminal equipment DTE (user equipment)rأزةطرت)DTEأزةادم(rData circuit terminating equipment DCE (node)rزإءدارةات)DCE دة(rUses physical layer specification X.21rدموااطادX.213
4
X.25 - LinkrLink Access Protocol Balanced (LAPB)rرووولاوولإارطوازن)LAPB(mThe link layer protocol LAPB of X.25 adopts the frame structure of High-level Data Link Control (HDLC)mومرووولطارطLAPB (رووولLAPB اصـX.25 داطر(frame) امارطاتاوى)HDLC(mSubset of HDLC. mورنHDLCmIt requires for setting up a link. mطبإدادارط.mLAPB can directly carry non-X.25 upper layer protocols for data transmission.mنأنلLAPB روووتاطارX.25 رةرلات.5
Link (Cnt)mTransmit the data effectively between DTE and DCEmإرلاتللنDTE ()ازاطرت(وDCE ()زاتات(mEnsure the synchronization of information between the receiver and sender mدنزااوتناموارلmDetect and correct errors in the transmissionmفواطءارلmIdentify and report the procedure error to the higher layer protocol.mددواغنطاراءإرووولاطا.mInform the packet layer of the link layer state mأطازطارط6
X.25 - PacketrExternal virtual circuitsrادواراراﺿارrLogical connections (virtual circuits) between subscribersrاتاط)ادواراراﺿ(نارن7
X.25 Use of Virtual Circuits8
Virtual Circuit ServicerVirtual CallاراﺿmDynamically established.سد.rThe connection established via X.25 protocol between two DTEs is called virtual circuit (VC)rﯾُطقالاذيمإؤهررووولX.25 نزيDTE امادارةاراﺿ)VC(rExists logically and is distinct from the physical circuit in circuit switching in nature.

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Term
Spring
Professor
Kubiatowicz
Tags
Asynchronous Transfer Mode, X 25, R uses, r Data circuit

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