explain the functions of data link layer

... 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 ... 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 ... 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...

Ngày tải lên: 22/12/2013, 13:17

... focused on the aesthetic quality of the data mapping techniques, and less on the usability of the according interaction methods. However, with the recent proliferation of online data visualization ... particular dataset was chosen to achieve an identifiable level of familiarity to the user, who should focus on the representation, instead of on the dataset’s meaning. Visualizations in the survey dataset ... equally be considered. However, aesthetic is often seen as an add-on, implemented at the very end of the development process. In fact, aesthetic in the context of data visualization is still not...

Ngày tải lên: 07/03/2014, 17:20

Ngày tải lên: 08/03/2014, 18:20

Ngày tải lên: 21/03/2014, 22:01

Ngày tải lên: 29/03/2014, 05:20

Ngày tải lên: 30/03/2014, 13:20

Ngày tải lên: 01/04/2014, 12:20

Ngày tải lên: 21/06/2014, 22:20

... dynamic extension of the theory of industrial organization, in the tradition of Joseph Schumpeter. It represents the other side of the coin, which glitters in the theory of the firm: transaction costs ... agency theory and the transaction costs theory as a theory of economic organization rather than as a theory of entrepreneurship. A separate line of thinking in the theory of the firm is the dynamic ... by traditional banks. Does the amended theory fully contradict the present one and have the concepts of the present theory become obsolete? The concepts of the present theory of financial intermediation...

Ngày tải lên: 24/10/2012, 09:11

Ngày tải lên: 05/09/2013, 16:10

Ngày tải lên: 05/09/2013, 17:03

... and replace partially the middle lamellae between the cortical cells of the feeder roots. The endomycorrhizae, which form on the roots of 90% of the plant species,enter the root cells and form an ... intermediates of the shikimic acid pathway ,the tri- carboxylic acid cycle, and from amino acids. The regulation of the biosynthesis of secondary metabolites is similar to that of the primary processes, ... [81]. Proof of the role of antibiotics as plant toxins has been provided in the case of syringomycin [82] which disrupts ion transfer across the plasmalemma of plant cells. Syringomycin synthetases are...

Ngày tải lên: 26/10/2013, 02:20

... 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