data link layer protocols in computer networks
Tài liệu Module 7- Data Link Layer CCNA Exploration 4.0 pptx
... Data Link Layer Protocols- The Frame31• Remember that although there are many different Data Link layer protocols that describe Data Link layer frames, each frame ... this chapter, you will be able to:• Explain the role of Data Link layer protocols in data transmission. • Describe how the Data Link layer prepares data for transmission on network media. • ... very simple.• In point-to-point networks, if data can only flow in one direction at a time, it is operating as a half-duplex link. If data can successfully flow across the link from each node...
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Chapter7 - DATA LINK CONTROL PROTOCOLS docx
... source access points (DSAP, SSAP) 2Introduction Data link control layer – often abbreviated simply to data link layer – is concerned with the transfer of data over a serial data link The transmission ... protocolThe data link layer is fundamental to the operation of all data communication applications 27Character-oriented Protocols – Half-duplex Protocols BSC 64Bit-oriented Protocols – Link ... EnvironmentsThe data link topology may bePoint-to-point circuitDirect physical connectionOperates on an end-to-end basis 51Bit-oriented Protocols – HDLC (High-level Data Link Control)Protocol...
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Báo cáo hóa học: "Research Article Cross-Layer Explicit Link Status Notification to Improve TCP Performance in Wireless Networks" potx
... packet in downlink communication with a stop-and-wait LL-ARQ. When the wireless link layer of BS fails in the first transmission attempt of the packet 1 (Layer- 2 ACKtimeout), the wireless link layer ... wireless link. In LL-ELSN, there is noadditional transmission over the wireless link and thus it hasno detection failure in uplink communication. LL-ELSN alsohas no detection failure in downlink ... RTTminupdating algorithm, in which RTTminis multiplied by a reducing factor lessthan one. However, since the RTTminupdating algorithmis invoked whenever a congestion event occurs, RTTmingoes...
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Tài liệu Báo cáo khoa học: Computational processing and error reduction strategies for standardized quantitative data in biological networks doc
... quantitative data and permit the cost-effective assembly of large, high-quality data sets.DiscussionQuantitative data generation is becoming increasinglyimportant for obtaining insight into the ... protein standard depicted in Fig. 1. Smoothing spline curves through originaland normalized data are shown as solid lines.M. Schilling et al. Strategies for standardizing quantitative data FEBS ... bio-chemical data. We use the erythropoietin receptor (EpoR)-inducedactivation of ERK1 in the hematopoietic suspensioncell line, BaF3-hemaglutinin-tagged (HA)-EpoR, andthe interleukin-6 (IL-6)-induced...
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qos in packet networks the springer international series in engineering and computer science
... integration, isundefined. If the integration interval a ~ b includes the integration ofover this interval is1; if lies outside of the integration interval, theintegration of over the interval is ... question underpinning this book in perspective.Referring to Figure 1.1, in the beginning of telecommunications, therewere in general two separate networks, one for voice and one for data. Eachnetwork ... consisting of two random experiments, “throwing a die”and “throwing a coin.” A player is to throw the die twice and the coin once.A player who gets the face with one spot in both die-throwings...
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Báo cáo hóa học: " Delay-throughput analysis of multi-channel MAC protocols in ad hoc networks" ppt
... hopping pattern or haveindividual hopping patterns. In multi-channel WLANsthe common hopping approach is used for example in Channel-Hopping Multiple Access (CHMA) which wasintroduced in [11]. ... Multi-channel Mac for Ad Hoc Networks: Handling Multi-channel Hidden Terminals Using a Single Transceiver, in 5th ACMInternational Symposium on Mobile Ad Hoc Networking and Computing,MobiHoc ‘04, 222–233 ... probabilities are derived in Appendix B. The amount of successful data negotiationsduring an ATIM window is on averageE[packets]= PsgaTatim.(18) In the beginning of each ATIM window all the...
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Báo cáo hóa học: " Research Article A Cross-Layer Approach in Sensing and Resource Allocation for Multimedia Transmission over Cognitive UWB Networks" docx
... considering the findings in the preliminary investigation,SNR is considered as the main QoS metric at the PHY layer to determine the appropriate sensing time for cognitive users in our cross layer ... l-centricadaptationPHY layer Layer withoutdecision freedomDeterminingtransmission actions(c)Application layer Layer lPHY layer Middleware(d)Applicationadaptation Layer ladaptationPHY layer adaptation(e)Figure ... Yusof,“Sensing period considerations in fading environment formultimedia delivery in cognitive Ultra Wideband system,” in Proceedings of IEEE International Conference on Signal andImage Processing...
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Báo cáo hóa học: "Research Article A Decentralized Approach for Nonlinear Prediction of Time Series Data in Sensor Networks" pptx
... the training set, making them unsuitablefor online applications. Therefore, it was essential to firstpropose a mechanism for controlling the increase in themodel order as new input data become ... promisingsubject for research.References[1] M. Rabbat and R. Nowak, “Distributed optimization in sensor networks, ” in Proceedings of the 3rd International Symposiumon Information Processing in ... dynamic fields.Online optimization of this criterion by adding or removingkernel functions from the dictionary also seems interesting.Finally, in a broader perspective, controlling the movementof...
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Báo cáo hóa học: " Editorial Cross-Layer Design for the Physical, MAC, and Link Layer in Wireless Systems" doc
... allowscertain important information to in uence decisions in a layer that is originally not defined to use that information(e.g., the SNR information at the link layer or the queue sizeat the baseband ... impacton these layers and their interaction. In recent years, theimportance of the cross -layer design at the PHY/MAC /link layer has been reiterated through the emergence of manyinnovative techniques, ... observationthat a cross -layer approach is particularly important whendesigning protocols at the physical (PHY) and mediumaccess control (MAC) /link layer. This is because the definingwireless features...
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Báo cáo hóa học: "Review Article Multicast Routing Protocols in Mobile Ad Hoc Networks: A Comparative Survey and Taxonomy Osamah S. Badarneh and Michel Kadoch" pdf
... sessionterminationSends leavemessage JoinAckJoinReq JoinReq JoinAckJoin ReplyJoin RequestReceiverNodeYJoin ReplyJoin RequestDownstream node detectsa link failure sendsJoinReq JoinAckJoin ... Communications and Networking 33Virtual link Physical link Figure 32: Physical link versus virtual link. Overlay link Physical link Destination nodeNon-member nodeSource coreS X Y Z Downstream ... for initializing, constructing,maintaining, and terminating a multicast session.When a source node has data to send, but no informationon a route to a receiver is known, it floods a Join Requestpacket,...
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Báo cáo hóa học: "Research Article An Energy-Efficient Link Layer Protocol for Reliable Transmission over Wireless Networks" pdf
... energy-efficient link layer protocol for reliable transmission overwireless sensor networks, ” in Proceedings of the IEEE Interna-tional Conference on Communications (ICC ’08), pp. 146–150,Beijing, China, ... number of data and header bits in theMAC data frame; for example, in 802.15.4, nhdr= 104 bitsare used in the short addressing mode [18] and the minimumheader size is 34 bytes in 802.11 networks. ... modeling thereliability of data transport in wireless sensor networks, ” in Proceedings of the15th EUROMICRO International Confer-ence on Parallel, Distributed and Network-Based Processing(PDP...
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Hình ảnh Protocols in relation to the OSI model.doc
... SessionNetwork Data link Physical zone 1 zone 2H2:H.323 Protocols in relation to the OSI modelG.711G.722G.728G.729G.723.1.1PresentationH.261 ... H.323 RAS signaling zone 1 zone 2H×nh 3: kiÕn tróc t¹i Terminal H.323 cña CiscoVideo Conference Architecturea typical H.323 TerminalVideo I/OEquipmentAudio I/OEquipmentUser Data ApplicationsSystemControlUserInterfaceH.225.0 Layer LocallAreaNetworkIntererfacerecoveryPathDelayVideo ... Data ApplicationsSystemControlUserInterfaceH.225.0 Layer LocallAreaNetworkIntererfacerecoveryPathDelayVideo codecH261, H263Audio condecG711, G722, G723, G728G729System control 1. Setup 2. Alerting 3....
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