explain the functions of data link layer
Tài liệu Module 7- Data Link Layer CCNA Exploration 4.0 pptx
Ngày tải lên :
22/12/2013, 13:17
... 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...
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The Effect of Aesthetic on the Usability of Data Visualization pdf
Ngày tải lên :
07/03/2014, 17:20
... 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...
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The theory of financial intermediation: An essay on what it does (not) explain
Ngày tải lên :
24/10/2012, 09:11
... 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...
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The Natural Functions of Secondary Metabolites
Ngày tải lên :
26/10/2013, 02:20
... 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...
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Module 9: The Transactional Data Access Layer
Ngày tải lên :
05/11/2013, 12:15
... 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....
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Tài liệu Introduction for the security : Networks and exchanges of data Computer security The risks ppt
Ngày tải lên :
09/12/2013, 17:22
... 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...
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Tài liệu From Data to Knowledge and Back Again: Understanding the Limitations of KMS pdf
Ngày tải lên :
20/12/2013, 19:15
... 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,...
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Tài liệu Module 8: The Nontransactional Data Access Layer doc
Ngày tải lên :
21/12/2013, 06:17
... 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...
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Tài liệu Data Centers Lowering the Cost of Ownership pptx
Ngày tải lên :
21/12/2013, 08:17
... 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....
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Tài liệu Module 9: The Transactional Data Access Layer pptx
Ngày tải lên :
17/01/2014, 09:20
... 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 ... 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...
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Tài liệu The Three Principles of Data Center Infrastructure Design pptx
Ngày tải lên :
24/01/2014, 11:20
... 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...
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