data link layer protocols example

Tài liệu Module 7- Data Link Layer CCNA Exploration 4.0 pptx

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 • 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. • The Data Link layer "sees" the logical topology of a network when 24 • The Data Link layer "sees" the logical ... 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 on network media. • Describe...
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Link Layer and LANs

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 ... channel: 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...
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ứng dụng của vhf data link mode 4 trong môi trường cns atm

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...
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Data Access Layer

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...
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Module 9: The Transactional Data Access Layer

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...
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Tài liệu Module 8: The Nontransactional Data Access Layer doc

Tài liệu Module 8: The Nontransactional Data Access Layer doc

Ngày tải lên : 21/12/2013, 06:17
... Data Shaping provider from ADO. When you use Data Shaping from ADO, you must setup an explicit connection to the OLE DB provider, as shown in the following example: Provider=MSDataShape; data ... to a data provider, as shown in the following example: Provider=MSDataShape; data provider=NONE 38 Module 8: The Nontransactional Data Access Layer XML Implementation ! Creating a Schema ! Writing ... 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...
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Tài liệu Phần cứng (Lớp Physical, Data Link) : Đèn liên kết(Link ) của card mạng không sáng ppt

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 ...
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Tài liệu Module 9: The Transactional Data Access Layer pptx

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, ...
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Tài liệu Using the Data Link Properties Dialog Box ppt

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 ... handler: Data Link Dialog Button.Click Creates 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 ... code is shown in Example 1-10 . Example 1-10. File: DataLinkDialogForm.cs // Namespaces, variables, and constants using System; // . . . private void dataLinkDialogButton_Click(object sender,...
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Tài liệu Chapter 7 :Data Link Control ppt

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...
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Tài liệu Chapter 11 Data Link Control pdf

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 ... the text. Note 11.50 Example 11.6 Figure 11.16 shows an example of Go-Back-N. This is an example of a case where the forward channel is reliable, but the reverse is not. No data frames are lost, ... after the time-out, it resends frame 0, which is acknowledged. Example 11.3 11.37 What is the utilization percentage of the link in Example 11.4 if we have a protocol that can send up to 15 frames...
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UNDERSTANDING INTERNET ROUTING ANOMALIES AND BUILDING ROBUST TRANSPORT LAYER PROTOCOLS docx

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...
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Tài liệu Chapter 3 - Application Layer Functionalityand Protocols CCNA Exploration 4.0 docx

Tài liệu Chapter 3 - Application Layer Functionalityand Protocols CCNA Exploration 4.0 docx

Ngày tải lên : 12/12/2013, 14:15
... Layer Protocols • The Application layer uses protocols that are implemented within applications and services. • While applications provide people a way to create messages and application layer ... upper OSI model layers provide network services to end user applications. • Describe how the TCP/IP Application Layer protocols provide the services specified by the upper layers of the OSI ... www.bkacad.com OSI and TCP/IP Model • The Presentation layer has three primary functions: 1. Coding and conversion of Application layer data to ensure that data from the source device can be interpreted...
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Báo cáo khoa học: "Towards A Modular Data Model For Multi-Layer Annotated Corpora" docx

Báo cáo khoa học: "Towards A Modular Data Model For Multi-Layer Annotated Corpora" docx

Ngày tải lên : 17/03/2014, 04:20
... proper data model for PACE-Ling (Sec. 2.2). The ultimate goal of our research is to create a modular extensible data model for multi- layer annotated corpora. To achieve this, we aim to create a data ... exists. 2 Data models There are three purposes data models can serve. The first purpose is context suitability. A data model used for this purpose must reflect as well as possible the data the user ... texts. Due to the vast amount of data involved in the project, the data model is not mapped to XML files, but to a SQL database for a better query performance. The DDD data model can be seen as an...
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