what the primary functions does data link layer
Tài liệu Module 7- Data Link Layer CCNA Exploration 4.0 pptx
... 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 ... Upper Layer Services to the Media 11 ã 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 ... 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 Describe the different types...
Ngày tải lên: 22/12/2013, 13:17
Module 9: The Transactional Data Access Layer
... 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 ... 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. ... 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
Tài liệu Module 8: The Nontransactional Data Access Layer doc
... Nontransactional Data Access Layer 43 Security ! Connecting to the Database ! Creating Security Roles Like the other layers, the DAL also requires secure access. Connecting to the Database The ... about the architecture of OLE DB. 2 Module 8: The Nontransactional Data Access Layer # ## # Introduction to the Data Access Layer ! The Business Problem ! Splitting the DAL The DAL ... returned from the query as it is processed. ! Static A static cursor creates a copy of the data in the dataset on the server. This consumes memory necessary to store the dataset. However, the cursor...
Ngày tải lên: 21/12/2013, 06:17
Testing the Trade Credit and Trade Link: Evidence from Data on Export Credit Insurance docx
Ngày tải lên: 22/03/2014, 18:20
Báo cáo hóa học: " Editorial Cross-Layer Design for the Physical, MAC, and Link Layer in Wireless Systems" doc
Ngày tải lên: 21/06/2014, 22:20
Link Layer and LANs
... at t 0 collides with other frames sent in [t 0 -1,t 0 +1] 5: DataLink Layer 5-2 Chapter 5: The Data Link Layer Our goals: ❒ understand principles behind data link layer services: ❍ error ... node ❒ adapter is semi- autonomous ❒ link & physical layers sending node frame rcving node datagram frame adapter adapter link layer protocol 5: DataLink Layer 5-36 Link Layer ❒ 5.1 Introduction and ... multiple access ❍ link layer addressing ❍ reliable data transfer, flow control: done! ❒ instantiation and implementation of various link layer technologies 5: DataLink Layer 5-49 Star topology ❒ Bus...
Ngày tải lên: 12/09/2012, 15:06
Báo cáo y học: "The primary prevention of birth defects: Multivitamins or folic acid"
... excluded from the data set of the HCAR. The HCCSCA procedure included five steps: The first step was the identification of cases from the data set of the HCAR that were reported in the first 3 ... far as I know the Hungarian data sets are unique to answer these questions. On the one hand now the results of the two Hungarian intervention trials are available and their pooled data are appropriate ... to do therefore our best to introduce the only one good solution, the primary prevention of CAs. No doubt that the primary prevention is better than the termination of pregnancy after the antenatal...
Ngày tải lên: 03/11/2012, 10:05
ứng dụng của vhf data link mode 4 trong môi trường cns atm
... + HF – (thoại tương tự) + VHF Data link: VDL Mode2 – (dữ liệu), VDL mode3 - (thoại và dữ liệu), và VDL mode4 - (dữ liệu). + SSR Mode S - (dữ liệu) + HF Data link – (dữ liệu). Các dịch vụ thông ... trên vùng lãnh thổ Việt Nam. Luận văn “ ỨNG DỤNG CỦA VHF DATA LINK MODE 4 TRONG MÔI TRƯỜNG CNS/ ATM ” nghiên cứu công nghệ kỹ thuật VHF Data Link Mode 4, một liên kết dữ liệu số sử dụng sóng VHF ... phát theo các bậc 25W phụ thuộc vào ứng dụng mà máy phát đáp sử dụng. Mặc dù là trạm mặt đất, nhưng các trạm vẫn quảng bá vị trí của trạm theo những khoảng thời gian đều đặn. Để đạt được theo...
Ngày tải lên: 22/11/2012, 09:13
nghiên cứu về tầng vật lý (physical) và tầng liên kết dữ liệu (Data Link) của mô hình OSI
Ngày tải lên: 23/08/2013, 10:37
Teaching the Four Skills in the Primary EFL Classroom
... make sure that the pupils understand the essential vocabulary they need to complete the task before they begin to read. 3. While the children are reading the text, move around the class providing ... building up the language they will need and providing a model on which they can then base their own efforts. The writing activities should therefore be based on a parallel text and guide the pupils, ... inhibits most pupils and forces them to concentrate on what they are saying as opposed to what they are reading and the meaning is very often lost. Writing In primary schools, EFL pupils progress...
Ngày tải lên: 06/09/2013, 10:10
Data Access Layer
... perform the CRUD operations required by the clients of the model—most likely to be the ViewModel. The objective of the DAL code is to protect the object schema from changes to the database ... returned. The FindAll method, on the other hand, returns every user in the database without discrimination. CHAPTER 8 ■ DATA ACCESS LAYER 177 Figure 8–7. The LINQ-to-SQL mapping of the e-commerce ... all of the address data in the Customer table. The objects may be retrieved with a composition relationship, but the database itself ignores that and stores the data in a single table. The final...
Ngày tải lên: 03/10/2013, 01:20