major responsibilities of data link layer
Link Layer and LANs
... with other frames sent in [t0-1,t0+1] 5: DataLink Layer 5-2Chapter 5: The Data Link Layer Our goals: ❒understand principles behind data link layer services:❍error detection, correction❍sharing ... channel: multiple access❍ link layer addressing❍reliable data transfer, flow control: done!❒instantiation and implementation of various link layer technologies 5: DataLink Layer 5-49Star topology❒Bus ... etc❍extracts datagram, passes to rcving node❒adapter is semi-autonomous❒ link & physical layerssendingnodeframercvingnodedatagramframeadapteradapter link layer protocol 5: DataLink Layer...
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MOB TME - Other aspects of wireless The layer transport - Bluetooth - Wifi Security
... of TCP be affected in by the use of wifi connections?3. What does the use of the mechanism of fast retransmit improve the performances of TCP in wireless environments in?4. Another series of ... information such asthe type of packet and the address of the recipient. The body contains the data to transmit. Theradio layer uses the dispersion of spectrum by jumping of FHSS frequency (Frequency ... level of layer 2 (IEEE 802.11), a frame is lost, it will be retransmitted. Itmay be thus that the protocol of layer 2 transmits twice the same packet. If thispacket contains a segment of TCP...
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How group work is used in speaking lesson of the first year major students of english at viet nam university of commerce
... former, 83.3% of the teacher often grouped students of the same sex while only 20% of the students chose it and for the latter, group students of different sexes was the choice of 80% of the students ... understanding of using group work in the speaking lesson at VUC.1.2. Aims of the studyThe purpose of this study is to explore the reality of the use of group work in the speaking lesson of 1st- ... process of group work. However, these studies have focused on the process of group work implementation in speaking lesson of non -major English students. A research into this area for English majors...
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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 ... 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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Bullding tables of data
... unnamedTable = new System .Data. DataTable(); System .Data. DataTable namedTable = new System .Data. DataTable("Customer");Visual BasicDim unnamedTable As New System .Data. DataTable() Dim namedTable ... tabular data as a collection of collections. Each DataTable object contains a collection of ordered rows, each existing as an instance of a DataRow object. Each row contains its own collection of ... is the process of crafting tables that ensure data integrity and take advantage of the processing power of relational database systems. E.F. Codd, inventor of the relational database model,...
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Data Access Layer
... 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 some sort of key ... important, independent of the DataMapper itself (see Figure 8–6). Only the clients of the DataMapper are aware of its existence and use it to interact with the RDBMS. Figure 8–6. The DataMapper pattern: ... different types of User C H A P T E R 8 ■ ■ ■ 163 Data Access Layer Silverlight and some WPF applications do not use offline storage for persisting data. Instead, they use a relational database...
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Statistical Description of Data part 1
... tendency, the moments of a distribution, the median and mode. In §14.2 we learn to test whether different data sets are drawn from distributions with different values of these measures of centraltendency. ... of integer powers of the values.Best known is the mean of the values x1, ,xN,x=1NNj=1xj(14.1.1)which estimates the value around which central clustering occurs. Note the use of an ... 610Chapter 14. Statistical Description of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright (C) 1988-1992...
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Statistical Description of Data part 2
... tendency, the moments of a distribution,the median and mode. In §14.2 we learn to test whether different data sets are drawn from distributions with different values of these measures of centraltendency. ... of integer powers of the values.Best known is the mean of the values x1, ,xN,x=1NNj=1xj(14.1.1)which estimates the value around which central clustering occurs. Note the use of an ... the mean is not the only available estimator of this614Chapter 14. Statistical Description of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright...
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Statistical Description of Data part 3
... makes use of the following routine for computing the mean and variance of a set of numbers,620Chapter 14. Statistical Description of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC ... routinevoid ftest(float data1 [], unsigned long n1, float data2 [], unsigned long n2,float *f, float *prob)Given the arrays data1 [1 n1]and data2 [1 n2], this routine returns the value of f,andits significance ... 1 degrees of freedom.The routine is#include <math.h>void tptest(float data1 [], float data2 [], unsigned long n, float *t,float *prob)Given the paired arrays data1 [1 n]and data2 [1 n],...
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Statistical Description of Data part 4
... the data sets aredrawn from the same distribution. Small values of probshow that the cumulative distributionfunction of data1 is significantly different from that of data2 . The arrays data1 and data2 are ... number of data points, Ne= N for the case (14.3.5) of one distribution, andNe=N1N2N1+ N2(14.3.10)for the case (14.3.6) of two distributions, where N1is the number of data points ... consider the case of comparing two binned data sets. Let Ribe thenumber of events in bin i for the first data set, Sithe number of events in the samebin i for the second data set. Then the...
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Statistical Description of Data part 5
... . .1.red# of red malesN11# of red femalesN21# of green femalesN22# of green malesN12# of malesN1⋅# of femalesN2⋅2.green# of redN⋅1# of greenN⋅2total ... number of degrees of freedom is equal to the number of entries in the table(product of its row size and column size) minus the number of constraints that havearisen from our use of the data themselves ... since the total of thecolumn totals and the total of the row totals both equal N, the total number of data points. Therefore, if the table is of size I by J, the number of degrees of freedom isIJ...
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Module 9: The Transactional Data Access Layer
... second of two 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 ... 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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Statistical Description of Data part 6
... respectively, the number of data points in the measurement of r1and r2.All of the significances above are two-sided. If you wish to disprove the nullhypothesis in favor of a one-sided hypothesis, ... is the mean of the xi’s, y is the mean of the yi’s.The value of r lies between −1 and 1, inclusive. It takes on a value of 1,termed“complete positive correlation,” when the data points ... concept of nonparametric correlation is this: If we replace the value of each xiby the value of its rank among all the other xi’s in the sample, thatis, 1, 2, 3, ,N, then the resulting list of...
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Principles of data mining
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- the role of data link layer
- what is the importance of data link layer
- functions of data link layer ppt
- functions of data link layer pdf
- the responsibilities of data link layer
- what is the function of data link layer in osi model
- discuss the important responsibilities of data link layer in osi model
- responsibilities of data link layer in internet model
- responsibilities of data link layer in a osi model
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