There are two fundamental protocols in the transport layer 1. TCP Transmission Control Protocol-- connection-oriented protocol 2. UDP User Datagram Protocol -- connectionless protocol Connection-oriented communication : establishes a logical (virtual) connection prior to sending data. Connectionless communication : sends data right away without establishing a logical connection Qn why do we have transport layer protocal? IP provides a weak, but efficient service model (best-effort ) How should hosts send into the network? i.)Flow Control ii.) Too fast is bad; too slow is not efficient IP packets are addressed to a host How to decide which application gets which packets? NOTE TRASPORT LAYER IS RESPONSIBLE FOR PROCESS TO PROCESS DELIVERY PORTS port is a communication endpoints Since there are many applications running on a computer, there is a need to decide which application gets which packet. A port number is a way to identify a specific application (proc
Definition of Terms Object-Oriented Design This is concerned with developing an object- oriented model of a software system to implement the identified requirements. The objects in an object-oriented design is related to the solution to the problem. There may be close relationships between some problem objects and some solution objects, but the designer inevitably has to add new objects and to transform problem objects to implement the solution. Object-Oriented Programming This is concerned with realizing a software design using an object-oriented programming language, such as Java or C++. An object-oriented a programming language provides constructs to define object classes and a run-time system to create objects from these classes. An Object An object is an entity that has a state and a defined set of operations that operate on that state. The state is represented as a set of object attributes. The operations associated with the object provide services to other objects (clients) th