What is Synchronous Data Transfer and Asynchronous Data Transfer?
369544
Synchronous - also referred to as "Blocking Mode" is when the data is being transferred one way at a time... and when data isn't being sent it's being waited upon, so the program "Blocks"\n\nAsynchronous is when data can be transferred back and forth at the same time.. and additionally the program is prompted before data comes in so it doesn't sit there waiting for data and doing nothing. Asynchronous is almost always preferred unless you are making a simple internet tool which only requires data going in or out and no other purpose.
982411
Try this ....\n\nMS-DOS 6.22\n\nThe DOS program that lets users send data between computers is called INTERLNK (pronounced "interlink"). It's a file transfer program that essentially lets one computer access the hard drive and printing functions of another computer. It won't let computers talk through the Internet using modems, nor will it lets users run DOS-based programs between computers. It's merely a way to transfer data. \n\nYour first move is to make sure INTERLNK is in the Config.sys file. If it's not in the file, place an Interlnk.exe file there by adding a DEVICE= statement. Type edit config.sys at the C> prompt. On one of the lines in the text window that appears, enter device=c:&#92;dos&#92;interlnk.exe. There will probably be other DEVICE= statements in this section so you have some sort of pattern to follow. \n\nAs soon as INTERLNK is installed, the program will begin looking to connect with another computer, one that is running Intersvr.exe, which is server software. (We'll talk about this more in a minute.) If the INTERLNK PC finds a companion, it will display a screen that looks like this:\n\n\nMicrosoft Interlnk Version 1.00\n\n\nPort=Com1\n\nDrive letters redirected: 5 (D: through H:)\n\nPrinter ports redirected: 1 (LPT3:)\n\nThe DEVICE=C:&#92;DOS&#92;Interlnk.exe statement adds one half of the PCs to our two-sided computer linkup. This part of the connection will be the client side, a program that's dependent upon another computer for a major part of its service. This other computer is the server. It will do a majority of the processing between our two computers so make sure that of the two PCs you're connecting, the stronger machine is the server. On this PC, you'll load the server software by typing intersvr at the C> prompt. \n\nYou must reboot both computers before the software will be fully installed. Once the client and server software is loaded, the programs will be looking for each other, usually on communications port 1 (COM1). If you've plugged the serial connector into a ny port other than COM1, type /com2 (or whichever COM port it was) at the end of the client DEVICE= statement. The complete client's DEVICE= statement for the new COM port will read "DEVICE=C:&#92;DOS&#92;Interlink.exe /com2". \n\nOne drawback to INTERLNK software is that the server PC can do nothing while the client has access to it. The server PC merely serves the client-side computer. This means you can't access files or print from the serving computer. On the client side, however, you'll have three new drives: D:, E:, and F:, which correspond to the A:, C:, and D: drives of the server. Access them with normal DOS commands.\n\nNOTE: You will need a PC-to-PC serial cross cable.\n\nPin --- Pin\n1 --- 1\n2 --- 3\n3 --- 2\n4 --- 5\n5 --- 4\n6,8 --- 20\n7 --- 7\n20 --- 6,8\n\nSee here for more info on the cabling:\nhttp://www.arcelect.com/rs232.htm
469705
Basically you'll need to open a port on each of the two processes, and send a packet between them to communicate.  Generally that will be structured as a sending/"talking" process and a "listening" process to catch the sent packet. In C, you'll need to check the library for the operating system and compiler you're using to find the appropriate functions.  Look under "low level IO", usually.
946919
No. Only data is transferred.
215916
you need a USB data transfer cable.
249072
Try a counter approach.\n\ngetDataObject()\n{\n  synchronized (this)\n  {\n    counter++;\n  }\n  if (!open) throw error;\n  try\n  {\n//  do stuff here...\n    return stuff;\n  }\n  finally\n  {\n    synchronized (this)\n    {\n      counter--;  // must decrement in sync block\n      notifyAll();\n    }\n  }\n}\n\nsynchronized close()\n{\n  // counter is guaranteed not to decrement\n  while (counter > 0)\n    wait();  // until here, so we won't miss the notifyAll from above!\n  open = false;\n}\n\nI deserve a beer for this I think...
304454
Computer-mediated communication is the exchange of information between persons by way of computer networks, this can be all kinds of information, for example text, images, audio, and video. The exchange of information can be real time communication or synchronous, this means that people are communicating with each other at the same time. An other form of communication is asynchronous, this means that people are communicating at different times. They can send and receive their messages at any time they want.
353766
There is something called a data transfer cable... \nalso known as File Transfer/ Data link Cable \nThis basically is a cable that connects the TWO computers together and all you have to do is drag and drop...\n\n(safer than cut and paste in case for something the transfer got interrupted.)\n\nWhat i suggest you do is simply drag and drop 500 at a time (u said you have over 4000) \n\nThis way your computer wont freeze up for having to be under the strain of such a large file transfer!\n\nOn e-Bay you could get them real cheap... for a couple of dollars...
143032
Centralized data processing & Decentralized data processing
338401
Interconnection, an ISO standard for worldwide communications that defines a networking framework for implementing protocols in seven layers.\n\nApplication(Layer 7) \nThis layer supports application and end-user processes. Communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified. Everything at this layer is application-specific. This layer provides application services for file transfers, e-mail, and other network software services. Telnet and FTP are applications that exist entirely in the application level. Tiered application architectures are part of this layer. \n\nPresentation(Layer 6) \nThis layer provides independence from differences in data representation (e.g., encryption) by translating from application to network format, and vice versa. The presentation layer works to transform data into the form that the application layer can accept. This layer formats and encrypts data to be sent across a network, providing freedom from compatibility problems. It is sometimes called the syntax layer. \n\nSession(Layer 5) This layer establishes, manages and terminates connections between applications. The session layer sets up, coordinates, and terminates conversations, exchanges, and dialogues between the applications at each end. It deals with session and connection coordination. \nTransport(Layer 4)\n This layer provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. It ensures complete data transfer. \nNetwork(Layer 3)\n This layer provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing. \nData Link(Layer 2) \nAt this layer, data packets are encoded and decoded into bits. It furnishes transmission protocol knowledge and management and handles errors in the physical layer, flow control and frame synchronization. The data link layer is divided into two sublayers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. The MAC sublayer controls how a computer on the network gains access to the data and permission to transmit it. The LLC layer controls frame synchronization, flow control and error checking. \nPhysical(Layer 1)\n This layer conveys the bit stream - electrical impulse, light or radio signal -- through the network at the electrical and mechanical level. It provides the hardware means of sending and receiving data on a carrier, including defining cables, cards and physical aspects. Fast Ethernet, RS232, and ATM are protocols with physical layer components.
30296
It's a synchronized database distributed accross multiple servers. \n\nhttp://en.wikipedia.org/wiki/Distributed_database\n\nGoogle is your friend.
406338
The terms replication and remote mirroring are frequently used interchangeably because their meanings are very similar. Replication is the process of duplicating primary data volumes over an IP connection to a storage subsystem at an alternate location. This redundant copy can then be used by business applications if access to the primary data is interrupted. The source and target of a replication are usually separated by a significant distance to safeguard data from disasters that effect a specific geographic location, such as a region-wide power outage.\n\nReplication techniques have two principle modes: asynchronous and synchronous. With asynchronous replication, the primary and secondary data volumes are no more than a few milliseconds out of sync, so the replication is nearly real-time. With synchronous replication, the primary and secondary copies are always identical, so it provides a true real-time duplication. (See Replication.)\n\nLike replication, remote mirroring uses redundancy to guarantee data availability. A remote mirrored data volume consists of two identical copies of the data connected by Fibre Channel. Both sides of a mirror process read and write I/Os to ensure each copy is a real-time duplicate of the other. The mirror copies are housed in separate data centers, connected over a local- or metro-area network (LAN or MAN). If a disaster interrupts access to one side of a mirror, the surviving copy will continue to service application I/O requests and therefore minimize the disruption to business users. \n\n...verbatim from veritas.com website
259973
This weblink will explain the differance between the 2\nhttp://www.erg.abdn.ac.uk/users/gorry/eg2069/async.html
69185
Within the Microsoft Development Environment (the place where a programmer would write applications which run on the Microsoft Windows Operating system), these are types of "synchronization objects".  For an overveiw of the first two, refer to http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/synchronization_objects.asp.  For an overview of critical sections, refer to http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/critical_section_objects.asp.\n\nDisclaimer: Keep in mind that the concept of "synchronization objects" was not invented by Microsoft but is something which has existed for quite some time and in many different operating systems.  Any operating system whose goal is to enable and support robust, scalable and resilient services / applications, will have some type of synchronization object approach in their architecture and tools.
182016
Multiplexing: The process by which two or more signals are transmitted over a single communications channel\nSynchronization: The coordination of a sending and receiving device, so that both simultaneously send and receive data at the same rate\nMulticasting: The ability to transmit multiple standard-definition programs simultaneously using a single digital broadcast channel
881032
physical data network transmission session ---Application
1169937
Universal Serial Bus\nyou can easily get more information here\nthanks