CONTENTS INTRODUCTION CLASSFUL ADDRESSING OTHER ISSUES A SAMPLE INTERNET

Real-Time Transport Protocol Real-time traffic v.S. multimedia traffic Real-time communication is the almost simultaneous production and use of the data, ignoring the short delay in transmission

Introduction This chapter describes the general concept of remote file access and reviews the concepts underlying a particular remote access mechanism Because the remote file access mechanism derives many ideas and details from the underlying OS, the chapter reviews the Linux file system and the semantics of file operations

Introduction X Focuses on the structure of programs that use RPC, and shows how program can be divided along procedure boundaries Introduces the stub procedure concept and a program generator tool that automates much of the code generation associated with ONC RPC

CONTENTS CONNECTIONS COMMUNICATION COMMAND PROCESSING FILE TRANSFER SIMPLE FTP Assignment

CONTENTS THE OSI MODEL LAYERS IN THE OSI MODEL TCPIP PROTOCOL SUITE ADDRESSING Tcp/IP VERSIONS CSIE, NTUT, TAIWAN

Multiple Threads Master thread for connection requests Slave threads for handling communication with clients Thread of execution: an abstraction of independent computation Single process can contain one or more threads CSIE, NTUT, Taiwan

Conceptual Server Algorithm Simple Server Algorithm Create a socket Bind the socket to the port Enter an infinite loop Accept request Process request Reply request Not enough in practice generally

Introduction Single thread for multiple transport protocols Motivation Server design and process structure An iterative example Concurrent multiprotocol servers

Introduction Loosely specified protocol software interface Interface functionality Conceptual interface specification · System calls Two basic approaches to network communication Basic I/ functions in Linux