data link layer in osi model ppt

... Data Link Layer Protocols- The Frame 31 ã 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: ã Explain the role of Data Link layer protocols in data transmission. ã Describe how the Data Link layer prepares data for transmission on network media. ã ... very simple. ã 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...

Ngày tải lên: 22/12/2013, 13:17

... Responsible for end-to-end integrity of data transmission. ã Segments data and also reassembles data from upper layers ã Delivers data in connection and connection-less modes ã Includes simplex (one ... Responsible for establishing and maintaining communications channels. In practice, often combined with the Transport Layer. Facilitates a dialogue between communicating systems and controls ... Network Layer and MAC sub -layer, providing flexibility between the two layers. Media Access Control (MAC) Responsible for framing. Builds frames from the 1’s and 0’s that the Physical Layer...

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Ngày tải lên: 21/08/2012, 16:18

... Session Network Data link Physical zone 1 zone 2 H2:H.323 Protocols in relation to the OSI model G.711 G.722 G.728 G.729 G.723.1.1 Presentation H.261 ... H.323 RAS signaling zone 1 zone 2 Hình 3: kiến trúc tại Terminal H.323 cña Cisco Video Conference Architecture a typical H.323 Terminal Video I/O Equipment Audio I/O Equipment User Data Applications System Control User Interface H.225.0 Layer Locall Area Network Intererface recovery Path Delay Video ... Data Applications System Control User Interface H.225.0 Layer Locall Area Network Intererface recovery Path Delay Video codec H261, H263 Audio condec G711, G722, G723, G728 G729 System control 1. Setup 2. Alerting 3....

Ngày tải lên: 24/08/2012, 21:11

Ngày tải lên: 23/08/2013, 10:37

... 4.2: Creating a Logical Data Model 19 Exercise 2: Determining Cardinality and Existence In this exercise, you will use the syntax discussed in the module to identify the cardinality ... PAGE INTENTIONALLY LEFT BLANK Activity 4.2: Creating a Logical Data Model In this activity, you will use the skills learned in this module to define the relationships within a logical data ... logical data model and produce a sample ER diagram for the Ferguson and Bardell, Inc. case study. In each of the two exercises in this activity, you analyze a single aspect of a logical data design....

Ngày tải lên: 21/12/2013, 06:16

Ngày tải lên: 21/12/2013, 19:15

... Networking Basics v 3.0 - Lab 2.3.7 Copyright  2003, Cisco Systems, Inc. 2. List the seven layers of the OSI model and the encapsulation unit used to describe the data grouping at each layer. ... Also list the networking devices that operate at each layer, if applicable. Layer # Name Encapsulation Unit or Logical Grouping Devices or Components that Operate at this Layer 7 6 5 4...

Ngày tải lên: 21/12/2013, 19:15

... trường hợp về sự cố mạng có thể do phần cứng hay phần mềm: Phần cứng (Lớp Physical, Data Link) : Đèn liên kết (Link ) của card mạng không sáng Kiểm tra đầu nối card mạng và đầu cáp nối trên HUB/SWITCH ... tra kết nối vật lý – Click nút Start -> Run -> gõ lệnh cmd cửa sổ command line hiện ra -> gõ lệnh ping đến địa chỉ IP của Default gateway mạng đơn vị mình ( Default gateway mạng 172.28.x.0 ... là 172.28.111.1 – Nếu thành công qua bước 2. – Nếu không thành công : + Xem xét lại thông tin cấu hình mạng đã đúng chưa. Nếu sai thì thay đổi lại cho đúng và thử lại bước 1. ...

Ngày tải lên: 23/12/2013, 03:17

... the neutral threading model, which is a more scalable threading model. For Microsoft Visual Basic đ components, use the apartment threading model, since the neutral threading model is not supported. ... Purchasing transactional DAL. Module 9: The Transactional Data Access Layer 3 The Business Problem DAL Connected Business Logic Layer Disconnected Business Logic Layer Facade Layer Web ... Editing Manager: Lynette Skinner Editor: Mick Alberts, Jennifer Linn Production Manager: Miracle Davis Print Coordinators: Linda Lu Cannon (Write Stuff), Marlene Lambert (Online Training Solutions,...

Ngày tải lên: 17/01/2014, 09:20

... to the server and to bind your data. 5.8 Hyperlink from a Row in the Data Grid to a Detail Page Often, I need to zero in and display data based on a record in the DataGrid control. How ... easy to link pages based on data. To see how the HyperLink type column is used in this How-To, take a look at Figure 5.14. Figure 5.14. No code is required for link pages based on data. By ... expand this example is to add the coding technique learned in the previous How-To for editing data. Using data with your Web Forms is not much harder than using Windows Forms. Just remember to...

Ngày tải lên: 21/01/2014, 12:20

... T he TCP/IP model uses four layers to perform the functions of the seven -layer OSI model. The network access layer is functionally equal to a combination of OSI physical and data link layers (1 ... are developed ã Aids in interpreting vendor explanations of product functionality Layer 1 – The Physical Layer The physical layer of the OSI model defines connector and interface specifications, ... the OSI model is only part of a LAN (Local Area Network). Layer 2 – The Data Link Layer Layer 2 of the OSI model provides the following functions: ã Allows a device to access the network to send...

Ngày tải lên: 24/01/2014, 09:20

... from the COM tab in Visual Studio .NET's Add Reference Dialog. The sample code contains a single event handler: Data Link Dialog Button.Click Creates and displays a Data Link Properties ... Recipe 1.13 Using the Data Link Properties Dialog Box Problem You want to display the Data Link Properties dialog b ox from an application so that users can create their own database connections ... they can from the Server Explorer window in the Visual Studio .NET IDE. Solution Use COM interop with the OLE DB Service Component to display the Data Link Properties dialog box. You'll...

Ngày tải lên: 26/01/2014, 10:20