Archive for the ‘Notes’ Category

  • Logical Database Design

    Sep 26, 13 • 3278 Views • Notes • • No Comments

    Database plays an integral role in the commercial domains, which provides users to store, update and retrieve the data. Database management system provides the system, tools and interfaces which helps to design a database. Logical database design is an

  • Object Oriented Data Model

    Sep 26, 13 • 2688 Views • Notes • • No Comments

      A data model is a logical organization of real world entities and relationships among objects. That data model which captures the object oriented concepts like encapsulation, abstraction, polymorphism, inheritance, etc. is called object oriented data

  • Introduction of Cache Memory with it’s Mapping Function

    Sep 19, 13 • 5329 Views • Science Notes • • No Comments

    In a computer system the program which is to be executed is loaded in the main memory. Processor then fetches the code and data from the main memory to execute the program. The DRAMs which from the main memory are slower devices. So it is necessary to insert

  • High Level Data Link Control- HDLC Protocol

    Sep 19, 13 • 6495 Views • Notes • • 2 Comments

    HDLC stands for High level data link control. HDLC is among the most important protocol in the data link layer. As we all know protocols are said to as set of rules. HDLC is a bit oriented data link protocol. That means it uses bit stuffing to achieve data

  • Data Link Layer Protocol and it’s Function

    Sep 19, 13 • 5216 Views • Notes • • 2 Comments

    As we all know, Data Link Layer is the second layer in the OSI model.  When the Data Link Layer is combined with physical layer of the OSI model with some interconnecting medium, it provides a connection for data transfer. This connection is reliable. The