M. L. Liu

M. L. Liu

1. Software Engineering Basics

   • Programming
     • In building network applications, there are two main classes of programming languages: procedural language and object-oriented language.
     • UML Class Diagram Notations
     • The Architecture of Distributed Applications
       • Presentation
       • Aplplication
       • Service Logic

2. Operating Systems Basics

   • A process consists of an executing program, its current values, state information, and the resources used by the operating system to manage its execution
   • Java processes
     • A Java application program has a main method, and is run as an independent(standalone) process.
     • An applet does not have a main method, and is run using a browser or the appletviewer.
     • A servlet does not have a main method, and is run in the context of a web server.
     • Three Types of Java programs
       • Applications
       • Applets
       • Servlets

3. Network Basics

   • Protocols
     • In the context of communications, a protocol is a set of rules that must be observed by the participants.
   • The network architecture
     • Network hardware transfers electronic signals,which represent a bit stream, between two devices.
   • Network Resources
     • An important class of network resources is network services such as the World Wide Web and file transfer (FTP), which are provided by specific processes running on computers.
     • Identification of Network Resources
       • Addressing an Internet Host
       • Addressing a process running on a host
       • Email Addresses

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