the responsibilities of data link layer

... consists of virtual connections between the nodes of a network independent of their physical layout. – These logical signal paths are defined by Data Link layer protocols. • The Data Link layer ... www.bkacad.com Overview Upon completion of 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 ... Upper Layer Services to the Media 11 • To support a wide variety of network functions, the Data Link layer is often divided into two sublayers: an upper sublayer and an lower sublayer. – The...

Ngày tải lên: 22/12/2013, 13:17

Ngày tải lên: 07/03/2014, 17:20

Ngày tải lên: 08/03/2014, 18:20

Ngày tải lên: 30/03/2014, 13:20

Ngày tải lên: 21/06/2014, 22:20

Ngày tải lên: 05/09/2013, 16:10

Ngày tải lên: 05/09/2013, 17:03

... outcome of the transaction. Operation of CRM The first step in the operation of the CRM is the client component’s creation of the CRM Worker. The client component then begins using the CRM Worker. ... satisfy the requirements of the Create Requisition use case. In the class, include the necessary methods to obtain the next database ID. The class should also cache database IDs from the database ... that focus on the DAL: Module 8, The Nontransactional Data Access Layer and Module 9, The Transactional Data Access Layer. ” The DAL is an application’s means of access to data services....

Ngày tải lên: 05/11/2013, 12:15

Ngày tải lên: 07/12/2013, 11:33

... Intranet we find a lot of data and information. For the live of the company, they're critical. If in the network, the security is bad, the information can be divulged and the system's ... The risks Networks and exchanges of data  For the exchange of the data, we've changed the technology   The paper before and now the electronic support The electronic version, it's ... the global perimeter.  The Intranets, the private networks inside the companies appear all over the world and grow. The benefits are important :     Gain of the productivity Gain of the...

Ngày tải lên: 09/12/2013, 17:22

... objective. The findings of this study illustrate that: (a) the KMS developed in the organization studied did not meet the claims of their creators, as the applications provided a poor approximation of the ... knowledge; (b) the importance of developing self-knowledge about the essence of social phenom- ena, and not just their form; (c) the role of commit- ment in learning; and (d) the selectivity of social Knowledge ... what to do. The use of the decision tree in consul- tation mode at the distributed regional interfaces is therefore excluded, in the [initial version of the appli- cation]. If, in the longer term,...

Ngày tải lên: 20/12/2013, 19:15

... the database. Also, the cursor does not track changes to the underlying data. This is useful if you need an unchanging snapshot of the data. 30 Module 8: The Nontransactional Data Access Layer ... is the first of two modules that focus on the DAL: Module 8, The Nontransactional Data Access Layer and Module 9, The Transactional Data Access Layer. ” The DAL is an application’s means of ... on MDAC, see the Microsoft Universal Data Access Web site at http://www.microsoft.com /data. Module 8: The Nontransactional Data Access Layer 43 Security ! Connecting to the Database ! Creating...

Ngày tải lên: 21/12/2013, 06:17

... reliability of services CASE STUDY MANAGING CAPITAL THROUGH SPACE SAVINGS At the heart of the EDF is ADC’s Glide Cable Management system. These cable management troughs bolt onto the side of standard ... because each panel has RJ45 connectors on the front and rear of the panel. Added benefits included the ability to quickly connect Ethernet switches to the network, improved designation labeling ... data centers. Major network elements chosen for the data centers included Cisco 7500 routers, Cisco Catalyst 6509 Ethernet switches and other data servers—each with unique connection requirements....

Ngày tải lên: 21/12/2013, 08:17

... outcome of the transaction. Operation of CRM The first step in the operation of the CRM is the client component’s creation of the CRM Worker. The client component then begins using the CRM Worker. ... satisfy the requirements of the Create Requisition use case. In the class, include the necessary methods to obtain the next database ID. The class should also cache database IDs from the database ... logic layer. The transactional DAL then processes the requests by delegating the requests to the data services layer. The transactional DAL can return to the business logic layer either success...

Ngày tải lên: 17/01/2014, 09:20

... the life of your data center. The Three Principles of Data Center Infrastructure Design Page 7 Deployment The graphic below depicts a sample data center using ADC's comprehensive line of ... and Prepare for the Future Business can optimize their data centers by selecting data center infrastructure solutions that work together. By recognizing the value of the data center infrastructure ... Cabling With the same percentage of terminations as copper, fiber optic cabling and connectivity is a significant part of the data center. Fiber links are also the most critical links because they...

Ngày tải lên: 24/01/2014, 11:20

... 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 just as they ... and displays a Data Link Properties dialog box using the Microsoft OLE DB Service Component through COM interop. The C# code is shown in Example 1-10 . Example 1-10. File: DataLinkDialogForm.cs ... reference to the Microsoft OLE DB Service Component 1.0 Type Library from the COM tab in Visual Studio .NET's Add Reference Dialog. The sample code contains a single event handler: Data Link...

Ngày tải lên: 26/01/2014, 10:20

... differences between the behavior of the SIR model and the data. Potential sources of these differences include inadequacies of the mathematical model to de- scribe the process underlying the data and issues ... final part of the outbreak data, as there is often a period lasting ten or more weeks when there are few cases. We investigated whether the removal of the lowest-valued points from the data sets ... fell below ten at the end of the outbreak. As a notational convenience, we refer to the numbers of susceptibles and infectives at the start of the first week of the truncated data set as S 0 and...

Ngày tải lên: 13/02/2014, 16:20

... with the consent of the contractor, shall form part of the agreement. 27. The contractor shall visit the site of the work & shall satisfy himself as to the conditions under which the ... 28. The contractor shall get the approval of the Architect regarding the route of conduits, No. of runs, diameter of conduits, No. & size of wires, location of pull boxes, route of cables ... the date of opening of the tenders. 4. The time completion of work shall be essence of the contract, and shall be completed within 60 days only from the date of award of work 5. Offers...

Ngày tải lên: 16/02/2014, 11:20

... more of the specific types of programming they want or how they can protect their families from unwanted programs or why diverse programming struggles to get on the air, then you must pull back the ... location of the device, we can make the assumption of what channels are received there. So instead of putting up an antenna, we are able to broadcast using the Internet. Now in the interest of time ... homes by the end of 2005, with further expan- sion as fast as technology and the marketplace will allow. We are making all of the necessary preparations for the commer- cial launch of FiOS TV...

Ngày tải lên: 18/02/2014, 00:20