REQUIREMENTS ENGINEERING (PART THREE)

After discussing about what requirements engineering is and the activities it involves. We moved forward to Requirements Elicitation which is part of Requirements definition. Now, we will discuss about the techniques involved in Requirements Elicitation. 1.CORE(Controlled Requirements Expression): To start with, CORE is the first technique used to accomplish the task of requirements elicitation. It is a requirements elicitation, analysis and specification method developed in late 1970’s and refined during early 1980’s. It is a…

Continue reading

REQUIREMENTS ENGINEERING (PART TWO)

Requirements engineering is not at all a simple phase in fact it involves numerous numbers of activities to be performed. To start with process of Requirements engineering is broadly divided into two activities that are:- 1. REQUIREMENTS DEFINITION 2. REQUIREMENTS MANAGEMENT First let’s focus on “requirements definition”. Requirements definition can again be divided into several activities. They are following:- Requirements Elicitation Requirements Analysis Requirements Documentation Requirements Review Now, we shall look at each and every…

Continue reading

REQUIREMENTS ENGINEERING (PART ONE)

First thing that comes to our mind after seeing the word “requirements engineering” is, that why requirement gathering and analysis are of so much importance for a technical profession like engineering? Well,the answer is quite obvious and that is demands of users. At the end the product,software etc. developed in engineering , are all for the ease of users. Thus seeing a product from user’s point of view and analyzing there requirements and expectations, from…

Continue reading

TRANSPORT LAYER (PART FIVE)

Elements Of Transport Protocols Following are some of the elements of transport protocol- Addressing: At the transport layer , a transport layer address called a port number is required to choose among multiple processes running on the destination host. The destination port number is required for delivery and the source port number is needed for the reply. In the internet model , the port numbers are 16 bit integers between 0 and 65,535. This number…

Continue reading

TRANSPORT LAYER (PART FOUR)

What is Socket? The communication structure used in socket programming is called as socket. A socket acts as an end point . Two processes can communicate if and only if they  have a socket at each end. Socket Structure:- Various fields in socket structure are as under:- Family: This field is used for defining the protocol group such as IPv4 or IPv6 , unix domain protocol etc. Type: Thus field is used for defining the…

Continue reading

TRANSPORT LAYER(PART THREE)

Transport Primitives:- The transport service primitives allow the transport layer users such as application programs to access the transport device. Each transport service has it’s own access primitives. The transport service is similar to network services but there are some important differences. The main difference is that the connection oriented transport service is reliable. The second difference between  the network services and transport services is that for whom the services are intended for. The transport…

Continue reading

TRANSPORT LAYER (PART TWO)

The Transport Layer Services:- The task of transport layer is to provide reliable and cost effective transport of data from source machine to destination machine. To achieve this goal , the transport layer makes use of the services provided by the network layer. What is transport entity? The hardware or software within the transport layer which does the work of making use of the services provided by the network layer is called as transport entity.…

Continue reading

THE TRANSPORT LAYER(PART 1)

Definition:- The transport layer is the core of the Internet model. The application layer programs interact with each other using the services of the transport layer. Transport layer provides services to the application layer and takes services from the network layer. Duties of Transport Layer:- Transport layer is meant for the process to process delivery and it is achieved by performing a number of functions. Following are the functions of transport layer:- 1. Packetizing: The…

Continue reading

ASYNCHRONOUS TRANSFER MODE(ATM)

ATM i.e. Asynchronous Transfer Mode is a streamlined transfer interface. It also is a connection oriented network and uses packets of fixed sizes for communication of data. These fixed size packets are called cells. This technique is used for efficient data transfer over high speed data networks. It provides real time and non-real time both services. It requires an adaption layer for supporting the information transfer protocols that are not based on ATM. APPLICATIONS :-…

Continue reading

OLAP IN DATA WAREHOUSE

What is OLAP:- OLAP i.e. online analytical processing is linked with processing of data as it is manipulated for analysis. The data warehouse provides the best opportunity for analysis and OLAP is the vehicle for carrying out involved analysis. Definition by OLAP council- OLAP is a category of the software technology that enables analysts, managers and executives to gain insight into data through fast,consistent, interactive, access in a wide variety of possible views of information…

Continue reading