《网络开发与应用》课程是计算机科学与技术专业的重要专业课程之一随 着互联网的蓬勃发展,计算机网络在社会经济和人们生活中占据着越来越重要的 地位,成为经济发展和现代生活不可缺少的一部分,掌握计算机网络知识成为社 会对人才的基本要求。作为培养高素质人才的高校,为了满足社会对人才的需求, 给《网络开发与应用》课程的教学提出了新的更高的要求

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

Transport layer protocol is to reate a process-to-process communication Provide control mechanisms Provide a connection mechanism for the processes

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

How applications become clients by initiating communication How applications use TCP or UDP protocols to contact a server How they use socket calls to interact with the protocols CSIE, NTUT, Taiwan

Examples Iterative, Connectionless Server (UDP) Iterative, Connected-Oriented Server (TCP) Concurrent. Connection-Oriented Server(TCP)

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

Contents NAME SPACE DOMAIN NAME SPACE DISTRIBUTION OF NAME SPACE DNS IN THE INTERNET RESOLUTION DNS MESSAGES TYPES OF RECORDS COMPRESSION EXAMPLES

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