data link layer in osi model ppt

... 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

... 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 ... Typical LAN Features for OSI Layer 1  The OSI physical layer, or Layer 1, defines the details of how to move data from one device to another  The OSI physical layer defines the standards used ... 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

... 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

... 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• ... 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 ... Control • The Data Link Layer in the Internet Trang 41High-Level Data Link ControlFrame format for bit-oriented protocols Trang 42High-Level Data Link Control (2)Control field of (a) An information

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

... Functions of a LAN • Data and applications • Share resources • Provide communication path to other networks LAN Sizes LAN Standards Ethernet Frame Structure Communicating Within the LAN MAC Address ... Understanding Ethernet BSCI v3.0—2-1 Local Area Network LAN Components • Computers – PCs – Servers • Interconnections – NICs – Media • Network devices

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 ... 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 ... 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

Ngày tải lên: 30/01/2020, 23:02

... 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• ... Net ModelsA Petri net with two places and two transitions. Trang 39Petri Net Models (2)Trang 40Example Data Link Protocols• HDLC – High-Level Data Link Control • The Data Link Layer in the Internet ... 31A Sliding Window Protocol Using Selective RepeatTrang 32A Sliding Window Protocol Using Selective Repeat (2)Trang 33A Sliding Window Protocol Using Selective Repeat (3)Trang 34A Sliding Window

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

... available to the banking system In our approach, changes in bank lending are induced by changes in interest rate, in a way that is consistent with the traditional interest rate channel In particular, ... evaluating projects are time consuming activities is equivalent to assuming that # < min(0,m) Furthermore, since every credit relationship involves one unit of funds and a single project, in our ... or whether banks find new projects at an infinite speed but their screening technology is intrinsically time-consuming Nevertheless, aggregate credit formation is time consuming, and the parameter

Ngày tải lên: 15/03/2014, 14:20

... N-terminal sequence of N-myristoylated proteins having Lys residue at position Amino acids at positions 3, and are in bold type Protein Ca2+ binding/EF hand proteins Aplycalcin Hippocalcin Neurocalcin ... demonstrates again that the specific interaction between an amino acid at a distinct position in the substrate protein and elements in the enzyme’s peptide-binding site will induce changes in the structure ... reside in these three distinct positions, or favorable amino acid combinations in these positions are not yet well characterized In a previous report, we showed that metabolic labeling in an in vitro

Ngày tải lên: 16/03/2014, 16:20

... for a Convertible Security The following definition of a self-financing trading strategy is standard Definition 3.5 By a self-financing strategy over the time interval [0, T ], we mean a pair (V0, ... are defined in (2), (24) and (25).Remarks 3.6 Note that the problem (VI) is defined over a domain in space variable S ranging to −∞, although only the positive part of this domain is meaningful ... holding at every time t∈ [0, Θ] one unit ofthe CDS(t, θ(t)) combined with the margin account, that is, either positive or negative positions inthe savings account At time t + dt the unit position

Ngày tải lên: 22/03/2014, 20:20

... calling LinkedIn - LinkedIn is a business-oriented social networking site Founded in December 2002 and launched in May 2003, it is mainly used for professional networking As of June 2010, LinkedIn ... practice, including online interactions through social media and social networking sites Referencing the FSMB House of Delegate’s Model Guidelines for the Appropriate Use of the Internet in Medical ... and personal data and to assure that “de-identified” data cannot be linked back to the user or patient Integrity Information contained on websites should be truthful and not misleading or deceptive

Ngày tải lên: 24/03/2014, 02:20

... Stratifying the mice based on the day 0 infarct size in the present study did not, however, influence the interpretation of the data and all transplanted animals were included in the final evaluation ... n = 12; ALDHloLin-: n = 5; ALDHhiLin-: n = 9) in the tissue sub served by the infarct related injury Representative CD31 labeling from the infarct zone of an ALDHhiLin-or ALDHloLin-transplanted ... that the initial infarct size in the murine AMI model is critical for the disease pro-gression and late infarct size [20] Thus, animals that only receive a small infarct recover easily from injury

Ngày tải lên: 18/06/2014, 16:20

... Methods: Following the guidelines for linguistic validation, the original US English scales were translated into Korean and cognitive interviews were administered The field testing responses of ... examined by a confirmatory factor analysis (CFA) of items with missing data, using the soft-ware Mplus [22] The missing data option in Mplus was implemented to avoid list-wise deletion Factor indicators ... though the model may fit the data well Therefore, other goodness of fit indices should be considered The CFI [23] and TLI [24] both are incremental fit indices, ranging from 0 (indicating poor

Ngày tải lên: 18/06/2014, 22:20

... concealment, video data hiding has found usage in a great number of applications In this work, we introduce the detailed framework of using data hiding for privacy information preservation in a video ... introduces the data hiding framework for managing privacy information and various embedding techniques and perceptual distortion and rate models Keeping the special constraints of data hiding for this ... used Using data hiding for privacy data preservation is more flexible as it completely isolates preservation from modifica-tion Since our introduction of using data hiding for privacy data preservation

Ngày tải lên: 22/06/2014, 00:20