data link layer ppt in computer networks

... Trang 8Truyền thông giữa các bộ thích ứng mạngframe datagram rcving node link layer protocol sending node frame adapter adapter  thêm thông tin điều khiển và kiểm soát lỗi Trang 9Định khung và ... use of these ppt slides:We’re making these slides freely available to all (faculty, students, readers) They’re in powerpoint form so you can add, modify, and delete slides (including this one) ... gọi là các liên kết (links)  các liên kết hữu tuyến  các liên kết vô tuyến  các mạng cục bộ ˆ đơn vị dữ liệu giao thức ở tầng 2 là frame , đóng gói/bao bọc gam dữ liệu “link” Tầng liên kết dữ

Ngày tải lên: 23/10/2014, 21:01

... CablingPin 4 Pin 4 Pin 5 Pin 5 Pin 6 Pin 2 Pin 7 Pin 7 Pin 8 Pin 8 Straight-through cable Crossover cable Trang 1710BASE-T Hubs The hub repeats the signal to all other devices Trang 18Reducing ... 3: Error Detection Most data-link protocols include a frame check sequence (FCS) or cyclical redundancy check (CRC) field in the data-link trailer This field contains a value that is the result ... network. Trang 42 Typical LAN Features for OSI Layer 2 Trang 5Data Link Function 1: Arbitration The specifications for these data-link protocols define how to arbitrate the use of the physical

Ngày tải lên: 12/08/2015, 09:13

... backlogged service classes traversing a single link TheGMQD is a model that minimizes the total queueing delay of all backlogged serviceclasses traversing a single link Depending on traffic load conditions, ... Minimum Queueing DelayGPS Generalized Processor Sharing IETF Internet Engineering Task Force IntServ Integrated Services JoBS Joint Buffer Management and Scheduling LIRA Location Independent Resource ... relevantstate information in the packet header so that core routers do not need to maintain per-flow state information 172.3 The main components of the packet forwarding engine in the ProportionalDifferentiation

Ngày tải lên: 17/09/2015, 17:20

... Trang 41 Sequence wind ow edge Window wind ow edge tx 1 frame receive ACK0 max window size max window Trang 424 2Trang 43 Data Link Control Protocols  The data link control layer is concerned ... Determine the link efficiency for the following type of data link if the velocity of propagation is 2.108 m/s and the bit error rates of the links are all negligibly low: 3 2 Trang 33Example of link ... channels over physical circuits) Trang 44 Data Link Protocol Application DTE DTE DTE: Data Terminal EquipmentDLP: Data Link Protocol DCE: Data Circuit Terminating Equipment : Communication Subsystem

Ngày tải lên: 04/12/2016, 08:57

... can be used to automate detecting layer two attacks • For more information, see “Detecting and Responding to Data Link Layer Attacks” published in SANS GCIA Reading Room ... Network Dilemma • About 1 year ago, sitting in a hotel room in Washington D.C. – “Free” Wireless Internet starts working intermittently – Users start complaining of Facebook posts they didn’t make ... sniff(iface=interface,prn=monitorPackets) 1 2 3 4 Trang 5Arp Spoofing• ARP translates layer 3 to layer 2 addresses • Clients maintain their own ARP tables of these logical-to-physical bindings •

Ngày tải lên: 12/09/2017, 01:26

... Data Link Protocols• HDLC – High-Level Data Link Control • The Data Link Layer in the Internet Trang 41High-Level Data Link ControlFrame format for bit-oriented protocols Trang 42High-Level Data ... 27Sliding Window Protocol Using Go Back NContinued  Trang 28Sliding Window Protocol Using Go Back NContinued  Trang 29Sliding Window Protocol Using Go Back NTrang 30Sliding Window Protocol Using ... Trang 1The Data Link LayerChapter 3 Trang 2Data Link Layer Design Issues• Services Provided to the Network Layer • Framing • Error Control • Flow Control Trang 3Functions of the Data Link Layer•

Ngày tải lên: 21/12/2017, 11:48

... 14Multiple Collision DomainsTrang 15Collision & Broadcast DomainsNo of Broadcast domains= No of every active interface of the Routers No of collision domains = No of every active interface of the ... StructureTrang 8Communicating Within the LANTrang 9MAC Address ComponentsTrang 10MAC AddressesTrang 11 Signals degrade with transmission distance.LAN Segment Limitations Trang 12Extending LAN SegmentsTrang ... Trang 1BSCI v3.0—2-1Understanding Ethernet Trang 2Local Area NetworkTrang 3LAN Components• Computers – PCs – Servers • Interconnections – NICs – Media • Network devices –

Ngày tải lên: 20/04/2018, 23:48

... as finding the most frequently element,finding distinct elements, etc.; and for graph problems, such as finding the minimumspanning tree, etc.; and for geometry problems, such as finding the intersection ... sublinear algorithms in three state-of-the-art big data domains, namely, datacollection in wireless sensor networks, big data processing using MapReduce, and Trang 18behavior analysis using metering ... is using o N/ time, where N is the input size Sublinear algorithms in space mean that one can look at all data because the Trang 24data is coming in a streaming fashion In other words, the data

Ngày tải lên: 05/03/2019, 08:25

... domains= No of every active interface of the Routers No of collision domains = No of every active interface of the Switches & Routers Trang 16CSMA/CDTrang 17BSCI v3.0—2-17ARP Exploring the ... 12Extending LAN Segments Shares bandwidth  Extends cable distances  Repeats or amplifies signal Trang 13CollisionsTrang 14Multiple Collision DomainsTrang 15Collision & Broadcast DomainsNo ... Trang 1BSCI v3.0—2-1Understanding Ethernet Trang 2Local Area NetworkTrang 5LAN SizesTrang 6LAN StandardsTrang 7Ethernet Frame StructureTrang 8Communicating Within the LANTrang 9MAC Address ComponentsTrang

Ngày tải lên: 08/11/2019, 18:10

... Models (2)SinhVienZone.Com Trang 40Example Data Link Protocols• HDLC – High-Level Data Link Control • The Data Link Layer in the Internet SinhVienZone.Com Trang 41High-Level Data Link ControlFrame ... protocols. SinhVienZone.Com Trang 42High-Level Data Link Control (2)Trang 43The Data Link Layer in the InternetA home personal computer acting as an internet host. SinhVienZone.Com Trang 44PPP – Point ... 3Functions of the Data Link Layer• Provide service interface to the network layer • Dealing with transmission errors • Regulating data flow SinhVienZone.Com Trang 4Functions of the Data Link Layer (2)Relationship

Ngày tải lên: 30/01/2020, 23:02

... 39Petri Net Models (2)Trang 40Example Data Link Protocols• HDLC – High-Level Data Link Control • The Data Link Layer in the Internet Trang 41High-Level Data Link ControlFrame format for bit-oriented ... Trang 1The Data Link LayerChapter 3 Trang 2Data Link Layer Design Issues• Services Provided to the Network Layer • Framing • Error Control • Flow Control Trang 3Functions of the Data Link Layer• ... 42High-Level Data Link Control (2)Control field of (a) An information frame. (b) A supervisory frame. (c) An unnumbered frame. Trang 43The Data Link Layer in the InternetA home personal computer acting

Ngày tải lên: 14/12/2021, 07:14

... truyền thông: links  Kết nối có dây (wired links)  Kết nối không dây (wireless links)  LANs  Gói dữ liệu ở lớp 2: frame, đóng gói datagram Tầng data-link có nhiệm vụ truyền datagram từ 1 ... kết dữ liệu (Data Link layer) Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 A note on the use of these ppt slides: We’re making these slides ... (còn gọi là network interface card NIC)  Ethernet card, 802.11 card; Ethernet chipset cpu memory host bus (e.g., PCI) network adapter card application transport network link link physical Trang

Ngày tải lên: 25/02/2023, 15:51

... High-level Data Link Control: single link procedure  Link access procedure version B (LAPB): extension of LAPA, used in X.25 networks  Multilink procedure: extension of LAPB  Link access procedure ... 1 km link of 1 Mbps and a send window K = 2 A 10 km link of 200 Mbps and a send window K=7 A 50 000 km satellite link of 2 Mbps, a send window K =127  Solution? Trang 34Example of link utilization: ... synchronous  Service offered by data link: Trang 45Telecomm Dept. Faculty of EEE DCN HCMUT Data Link Protocol Application DTE DTE DTE: Data Terminal Equipment Trang 46Data Link Protocol ApplicationTrang

Ngày tải lên: 12/04/2023, 21:00

... Network Acces Layer (Lớp truy nhập mạng) tơng ứng với physicallayer & Data link layer trong OSI + Internetwork layer: định tuyến gói dữ liệu giữa các máy chủ + Host to host layer: kết nối ... ITU (International Telecommunication Union - Hiệp hội viễnthông quốc tế) Physical layer: X21, X21 bis Data link layer: LAP-B Network layer: X25 - TCP/IP (Transmission Control Protocol/Internet ... mạng chuyển mạch gói(Packet Switched Network) Physical layer: X25.1 tớng ứng X21 bit Data link layer: X25.2 tơng ứng với LAP-B Network layer: X25.3 đặc tả giao diện DTE/DCE * Các chuẩn X3, X28

Ngày tải lên: 19/06/2023, 11:23

... received or nothing to send Filler characterUrgent message from receiverHeader information beginsText begins Alerts receiver to incoming frameSender is pausing but not relinquishing the lineGood frame ... odd frame received Data transparency markerRequest for a responseSender terminatingEnd of transmission block; ACK requiredEnd of text in a message End of intermediate block in a multiblock transmissionBad ... Control frame: chỉ chứa các thông tin về điều khiển • Data frame: chứa các thông tin về dữ liệu, nhưng cũng có các thông tin điềukhiển dùng trong thông tin này e Data Frame: Hình 11.4 • Chiều mũi

Ngày tải lên: 08/08/2014, 10:20

... wireless link In LL-ELSN, there is no additional transmission over the wireless link and thus it has no detection failure in uplink communication LL-ELSN also has no detection failure in downlink ... (a) downlink communication, and (b) uplink communication Table 1: Comparison of ELN schemes ELN delay (downlink) Twls data+Twls+Twrd Twls+Twrd Twls+Twrd Twrd ELN delay (uplink) Twls data+Twls+ ... RTTminupdating algorithm, in which RTTmin is multiplied by a reducing factor less than one However, since the RTTmin updating algorithm is invoked whenever a congestion event occurs, RTTmin goes

Ngày tải lên: 21/06/2014, 20:20

... Kristin KlingerSenior Managing Editor: Jamie Snavely Managing Editor: Jeff Ash Assistant Managing Editor: Carole Coulson Cover Design: Lisa Tosheff Printed at: Yurchak Printing Inc. Published in ... degrees in mechanical engineering from M.I.T in 1986, 1987 and 1989, respectively He also received an SM degree from MIT in electrical engineering and computer science in 1988 Following graduation, ... well as infotainment, to Intra-Ve-be incorporated into modern automotive designs Critical data is Intra-Ve-being exchanged within a vehicle and with outside the vehicle via vehicular networks

Ngày tải lên: 27/06/2014, 01:21

... 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 ... adaptation Layerl PHY layer (b) Application layer Layerl-centric adaptation PHY layer Layer without decision freedom Determining transmission actions (c) Application layer Layerl PHY layer (d) ... “Sensing period considerations in fading environment for multimedia delivery in cognitive Ultra Wideband system,” in Proceedings of IEEE International Conference on Signal and Image Processing

Ngày tải lên: 21/06/2014, 11:20

... Data Link Layer Protocols- The Frame 31 • Remember that although there are many different Data Link layer protocols that describe Data Link layer frames, each frame ... 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 ... 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. •...

Ngày tải lên: 22/12/2013, 13:17

... Balanced (LAPB)  Part of X.25 (ITU-T)  Subset of HDLC - ABM  Point to point link between system and packet switching network node  Link Access Procedure, D-Channel  ISDN (ITU-D)  ABM  Always ... i  Transmitter goes back to frame i and retransmits William Stallings Data and Computer Communications Chapter 7 Data Link Control Cyclic Redundancy Check  For a block of k bits transmitter ... - Diagram Flow Control  Ensuring the sending entity does not overwhelm the receiving entity  Preventing buffer overflow  Transmission time  Time taken to emit all bits into medium  Propagation...

Ngày tải lên: 16/02/2014, 08:20