Saturday, July 25, 2009

FTP

FTP we define as file transfer protocol.

  • Definition 1. An upper layer protocol, works cooperatively at the session, presentation and application layers. FTP provides services for file transfer as well as directory and file manipulation services (DIR, Delete, and so forth). Each upper layer provides its specific service to FTP; for example, the session layer provides connection establishment and release.
  • Definition 2. One of more popular method of accessing files on the Internet is with ht File Transfer Protocol (FTP). FTP provides a standard, Error-free way yo clients and servers are support on most operating system.
  • File transfer Protocol (FTP) is an Internet protocol designed to make the coping of files from one computer to another convenient efficient.

FTP is extremely useful for retrieving information from

Internet archives. Such Internet site contains a wide variety of information and most large software suppliers maintain their own archives containing upgrades to their software. A great deal of software is also available free of charge from archives, including large-scale applications and even full operating systems.

FTP is designed to be useful to any Internet user, irrespective of the Operating System or hardware used. In order to facilitate this, FTP offers different ways to transfer files dependent on their contents. Straightforward ASCII files are transferred in the most appropriate way for the user. Binary files (for example program files) are transferred in byte by byte fashion.

Using FTP requires that the user login to the computer that are to be copied. Login in this context means that the user has an account on that computer and has been given a user name and password. This is major limitation for Internet archive sites that must be able to service many million potential users. It is obviously impossible to set up accounts for all of this population. To get around this difficulty, it is usual to set up an FTP site to allow for Anonymous FTP. In this case users can access the archive without needing an account. They can login using the user name anonymous and either no password, or perhaps their e-mail address.

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