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y o c u -tr a c k c LAN Question File sharing VS client server? Response Network Application tool process Appl icati Data base Client Server The file sharing model > Network Appl icati SQL exec Data base Data base Data base Interface Interface The client/ server model File sharing - File are shared for a lot of machines in the network(each machine can access to the shared files) - It can create heavy network traffic(each access to a large file can potentially block of the file, showing the system amount of information temporarily unavailable to other user) Question Distributed Database Topology? - - Client server Database are stored in the server machines and client machines can send request for appropriate data Only the records matching the request criteria raresent back to client machines so the sys never has heavy traffic d o m o w w w d o C lic k to bu y bu to k lic C w w w N O W ! h a n g e Vi e N PD ! XC er O W F- w m h a n g e Vi e w PD XC er F- c u -tr a c k c y o c u -tr a c k c - With distributed processing system, user can access data, that is located among a number of physically separate servers It provides user with a globol view of the data - With distributed database, the problems with implementing still exists - Developing distributed database application requires extensive planning to anticipate the many complex possibilities - For a large number of transactions travelling across the network the capacity of communication lines and the possible impact a system must be carefully considered Chapter 12: THE TCP/IP PROTOCOL SUITE Question The OSI model? - OSI model, adopted in 1983 by IOS , which is a framework for defining standards for linking hetenogenerous computer - The communication function are pastitioned into a vertical set of layers Each layer performs are lated subset of the functions required to communicate with other sys - The OSI layers Physical: concerned with transmission of unstructured bit stream over physical medium, deals with the mechinical, electrical, functional, and procedual characteristrics to access the physical medium Data link: provides for the reliable transfer of information across the physical link, send blocks of data with the necessary synchronization, error control, and flow control Network: provides upper layers with independence from the data transmission and switching technologies used to connect systems, responsible for establishing, maintaining and terminating connections Transport: provides rediable, transparent transfer of data between end points, provide end_to_end error recovery and flow control Session: provides the control structure for communicaton between applications, establishes, manages, and terminates connections between cooperating applications Presentation: provide independence to the application processes from difference in data representation(syntax) Application: provide access to the OSI environment for users and also propvides distributed information services User oriented Application Users of transport Presentation service End to end Session connection oriented Transport Network Point to point Data link Network service link oriented Physical Perspectives on the OSI architecture Question Protocols? d o m o w w w d o C lic k to bu y bu to k lic C w w w N O W ! h a n g e Vi e N PD ! XC er O W F- w m h a n g e Vi e w PD XC er F- c u -tr a c k c y o c u -tr a c k c Both OSI and the TCP/IP protocol suite deal with communications among hetrnogenerous computers Both are based on the concept of protocol and have many similarities a TCP/IP protocol architecture TCP: Transmission Control Protocol IP: Internet Protocol - The TCP/IP protocol architecture is based on a view of communication that involves three agents: processes, hosts, and networks - Communication between processes takes place across networks to which the hosts are attached - A network need only be concerned with routing data between hosts, as long as the hosts agree how to direct data to processes - It is natural to organize protocols into four layer i Network access layer: contains those protocols that provide access to a communication network ii Internet layer consists of the procedures required to allow data to traverse multiple networks between hosts iii Host_host layer: containts protocol entities with the ability to deliver data between two processes on different host computers iv Process/ application layer: contains protocols for resource sharing and remote access b Operation of TCP/IP OS Application TCP IP Network access protocol OS Application TCP IP Network access protocol IP Network Network Netwo NAP Communications using the TCP/ IP protocol architecture NAP: Network Access Points - IP is implemented in all of the end systems it keeps track of blocks of data to ansure that all are dilivered veliably to the appropriate application - For successful communication, every entity in the over all sys must have a unique address, two level of addressing are needed Global Internet Address(for communication) Ports(for service) Try your best, you will get the best! d o m o w w w d o C lic k to bu y bu to k lic C w w w N O W ! h a n g e Vi e N PD ! XC er O W F- w m h a n g e Vi e w PD XC er F- c u -tr a c k c y o c u -tr a c k c Contents BOOK I: Computer system fundamentals CHAPTER INTRODUCTION TO COMPUTER CHAPTER MICROPROCESSOR d o m o w w w d o C lic k to bu y bu to k lic C w w w N O W ! h a n g e Vi e N PD ! XC er O W F- w m h a n g e Vi e w PD XC er F- c u -tr a c k c y o c u -tr a c k c CHAPTER BATCH/ ONLINE AND REAL TIME PROCESSING SYSTEM CHAPTER PRINTERS AND TERMINALS CHAPTER DATA STORAGE MEDIA CHAPTER COMPUTER FILES CHAPTER DIRECT ACCESS FILE ORGANIZATION AND STRUCTURES 10 CHAPTER 11 INTRODUCTION TO ARTIFICIAL INTELLIGENCE 12 CHAPTER 12 EXPERT SYSTEMS 12 BOOK II: Computer systems architecture CHAPTER NUMBER BASES .13 CHAPTER NUMBER BASES .13 CHAPTER TYPES OF INSTRUCTION AND ADDRESSING 16 CHAPTER PROGRAMMING LANGUAGES 18 CHAPTER TRANSLATORS .20 CHAPTER SOFTWARE .21 CHAPTER MEMORY MANAGEMENT 23 CHAPTER NETWORKING 23 CHAPTER 10 DATA COMMUNICATION .26 CHAPTER 11 DISTRIBUTED PROCESSING 27 CHAPTER 12 THE TCP/IP PROTOCOL SUITE 28 Cách xóa Windows Media Player 11 1a Cho cài wmp11 đàng hoàng: Code: "C:\Program Files\Windows Media Player\Setup_wm.exe" /Uninstall d o m o w w w d o C lic k to bu y bu to k lic C w w w N O W ! h a n g e Vi e N PD ! XC er O W F- w m h a n g e Vi e w PD XC er F- c u -tr a c k c ... provides upper layers with independence from the data transmission and switching technologies used to connect systems, responsible for establishing, maintaining and terminating connections Transport:... 1983 by IOS , which is a framework for defining standards for linking hetenogenerous computer - The communication function are pastitioned into a vertical... distributed information services User oriented Application Users of transport Presentation service End to end Session connection oriented Transport Network Point to point Data link Network service link