data link layer protocols wiki
Tài liệu Module 7- Data Link Layer CCNA Exploration 4.0 pptx
Ngày tải lên :
22/12/2013, 13:17
... 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 ... logical signal paths are defined by Data Link layer
protocols.
ã The Data Link layer "sees" the logical topology of a network when
24
ã The Data Link layer "sees" the logical ... 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 Describe...
- 64
- 507
- 0
Chapter7 - DATA LINK CONTROL PROTOCOLS docx
Ngày tải lên :
30/03/2014, 07:20
... protocol
The data link layer is fundamental to the
operation of all data communication
applications
27
Character-oriented Protocols –
Half-duplex Protocols
BSC
64
Bit-oriented Protocols –
Link ... receiver
Error detection at MAC layer
32 bit CRC
Destination and source access points (DSAP, SSAP)
2
Introduction
Data link control layer – often abbreviated
simply to data link layer – is concerned ... the data link layer may be either a
simple
best-try (connectionless)
service or a
reliable
(connection-oriented)
service
DATA LINK CONTROL
PROTOCOLS
26
Character-oriented Protocols...
- 65
- 576
- 2
Link Layer and LANs
Ngày tải lên :
12/09/2012, 15:06
... 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 detection, correction
❍
sharing ... etc
❍
extracts datagram, passes
to rcving node
❒
adapter is semi-
autonomous
❒
link & physical layers
sending
node
frame
rcving
node
datagram
frame
adapter
adapter
link layer protocol
5: DataLink Layer ... 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...
- 109
- 615
- 1
ứng dụng của vhf data link mode 4 trong môi trường cns atm
Ngày tải lên :
22/11/2012, 09:13
...
+ 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 ... phân lớp điều khiển truy nhập MAC ( Medium
Access Control ), Dịch vụ liên kết dữ liệu DLS ( Data Link service ) và thực thể quản lý
liên kết ( LME ). Lớp liên kết dữ liệu VDL cung cấp sự truyền...
- 124
- 1.2K
- 29
Data Access Layer
Ngày tải lên :
03/10/2013, 01:20
... CHAPTER 8 ■ DATA ACCESS LAYER
174
private void DisconnectFromDatabase()
{
if (_databaseConnection.State != ConnectionState.Open)
{
_databaseConnection.Close();
}
}
private IDataReader ... CreateUserFromReader(IDataReader dataReader)
{
int id = dataReader.GetInt32(0);
string name = dataReader.GetString(1);
string emailAddress = dataReader.GetString(2);
string password = dataReader.GetString(2); ... the project, only the parts of the database that are in use by the object model should have
been generated.
CHAPTER 8 ■ DATA ACCESS LAYER
164
DATABASE KEYS
Database tables should always have...
- 22
- 464
- 0
Module 9: The Transactional Data Access Layer
Ngày tải lên :
05/11/2013, 12:15
... modules that focus on the data access layer
(DAL). In Module 8, “The Nontransactional Data Access Layer, ” you learned
about data retrieval. In this module, you will learn about data manipulation. ... same data
access technologies as that of the nontransactional DAL. The following data
access technologies were covered in Module 8, “The Nontransactional Data
Access Layer :
!
Microsoft Data ...
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.
After completing this...
- 34
- 428
- 0
Tài liệu Module 8: The Nontransactional Data Access Layer doc
Ngày tải lên :
21/12/2013, 06:17
... Nontransactional Data Access Layer 15
Data Shaping Service
!
Relation-based Hierarchical Rowsets
!
Group-based Hierarchies
!
Using Data Shaping
!
Sample Definition
OLE DB provides a Data Shaping ... is any component that owns data. It exposes its data in a
tabular format, regardless of the format in which it stores data. Examples of
data providers are relational database management systems ... Nontransactional Data Access Layer
#
##
#
Introduction to the Data Access Layer
!
The Business Problem
!
Splitting the DAL
The DAL buffers the entire system from the underlying data services....
- 62
- 362
- 0
Tài liệu Phần cứng (Lớp Physical, Data Link) : Đèn liên kết(Link ) của card mạng không sáng ppt
Ngày tải lên :
23/12/2013, 03:17
... 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
...
- 2
- 528
- 0
Tài liệu Module 9: The Transactional Data Access Layer pptx
Ngày tải lên :
17/01/2014, 09:20
... same data
access technologies as that of the nontransactional DAL. The following data
access technologies were covered in Module 8, “The Nontransactional Data
Access Layer :
!
Microsoft Data ... DAL.
Module 9: The Transactional Data Access Layer 3
The Business Problem
DAL
Connected Business
Logic Layer
Disconnected Business
Logic Layer
Facade Layer
Web Services Facade Business ... data services layer. The transactional DAL can return to the
business logic layer either success or failure. If the transaction also involved
retrieving data as a result of updates to the data, ...
- 34
- 324
- 0
Tài liệu Using the Data Link Properties Dialog Box ppt
Ngày tải lên :
26/01/2014, 10:20
...
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 ... Reference
Dialog.
The sample code contains a single event handler:
Data Link Dialog Button.Click
Creates and displays a Data Link Properties dialog box using the Microsoft OLE
DB Service Component ... shown in Example 1-10
.
Example 1-10. File: DataLinkDialogForm.cs
// Namespaces, variables, and constants
using System;
// . . .
private void dataLinkDialogButton_Click(object sender, System.EventArgs...
- 2
- 377
- 0
Tài liệu Chapter 7 :Data Link Control ppt
Ngày tải lên :
16/02/2014, 08:20
... DLC Protocols
(LAPB,LAPD)
Link Access Procedure, Balanced (LAPB)
Part of X.25 (ITU-T)
Subset of HDLC - ABM
Point to point link between system and packet
switching network node
Link ...
i
Transmitter goes back to frame
i
and
retransmits
William Stallings
Data and Computer
Communications
Chapter 7
Data Link Control
Cyclic Redundancy Check
For a block of
k
bits transmitter ... frames
Three phases
Initialization
Data transfer
Disconnect
Control Field
Different for different frame type
Information - data to be transmitted to user (next
layer up)
Flow and error control...
- 51
- 851
- 1
Tài liệu Chapter 11 Data Link Control pdf
Ngày tải lên :
16/02/2014, 20:20
... serves
as both ACK 2 and ACK 3.
11.2
11-1 FRAMING
11-1 FRAMING
The data link layer needs to pack bits into
The data link layer needs to pack bits into
frames
frames
, so
, so
that each frame ... sender events. Request events are
triggered by data from the network layer; arrival events
are triggered by acknowledgments from the physical
layer. There is no time-out event here because ... of protocols discussed in this chapter
11.21
Algorithm 11.3 Sender-site algorithm for Stop-and-Wait Protocol
11.10
Flow control refers to a set of procedures
used to restrict the amount of data
that...
- 103
- 1.2K
- 5
Tài liệu Báo cáo khoa học: "Untangling the Cross-Lingual Link Structure of Wikipedia" pptx
Ngày tải lên :
20/02/2014, 04:20
... cross-lingual interwiki links
between pages, in total 77.07 million undirected
edges (146.76 million original links). Dataset
B additionally includes 2.2 million redirect-based
edges. Wikipedia deals ... the Linked Data Web,
Freebase
1
, which combines human input and au-
tomatic extractors, and YAGO (Suchanek et al.,
2007), which adds an ontological structure on top
of Wikipedia’s entities. Wikipedia ... Wikipedia
We downloaded February 2010 XML dumps of
all available editions of Wikipedia, in total 272
editions that amount to 86.5 GB uncompressed.
From these dumps we produced two datasets.
Dataset...
- 10
- 542
- 1
UNDERSTANDING INTERNET ROUTING ANOMALIES AND BUILDING ROBUST TRANSPORT LAYER PROTOCOLS docx
Ngày tải lên :
15/03/2014, 21:20
... performance
using striping techniques at the link- layer, transport -layer, and application -layer. We are
the first to implement and evaluate a transport -layer protocol that can utilize multiple
paths ... inverse-
multiplexing in link- layer protocols to enhance throughput by aggregating the bandwidth
of different links. Adiseshu et al [1], Duncanson et al [23], and Snoeren [81] provided
link- striping algorithms ... and robustness.
Based on the network layer where the striping techniques are applied, we classify them
into link- layer, transport -layer, and application -layer striping.
2.1 Network Testbeds
We...
- 132
- 256
- 0
Báo cáo khoa học: "Multilingual Named Entity Recognition using Parallel Data and Metadata from Wikipedia" potx
Ngày tải lên :
23/03/2014, 14:20
... foreign phrases in Wikipedia, using
Wikipedia metadata. The following sources of in-
formation were used from Wikipedia: category an-
notations on English documents, article links which
link from phrases ... and article
links we define a local English wiki- based tagger
and a global English wiki- based tagger, which will
be described in detail next.
Local English Wiki- based tagger. This Wiki- based
tagger ... multi-lingual data with named
entity tags. We build on prior work utiliz-
ing Wikipedia metadata and show how to ef-
fectively combine the weak annotations stem-
ming from Wikipedia metadata with...
- 9
- 333
- 0
