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

CONTENTS TCP SERVICES NUMBERING BYTES FLOW CONTROL SILLY WINDOW SYNDROME ERROR CONTROL TCP TIMERS CONGESTION CONTROL SEGMENT OPTIONS CHECKSUM

CONTENTS BRIEF HISTORY PROTOCOLS AND STANDARDS STANDARDS ORGANIZATIONS INTERNET STANDARDS INTERNET ADMINISTRATION CSIE, NTUT, TAIWAN

一、比重的测定 土壤比重又称真比重,是指单位体积的固体土粒重与同体积的水重之比。土壤比重可 用来计算土壤的总孔隙度,其数值大小还可间接反映土壤的矿物组成和有机质含量

一、反馈概念 二、反馈类型判断 三、反馈电路指标计算 四、反馈对电路性能的影响 五、自激振荡及其消除