Telnet & FTP. Department of Educational Multimedia Faculty of Education

Transcription

1 Telnet & FTP Department of Educational Multimedia Faculty of Education

2 TCP/IP Applications World Wide Web's Hypertext Transfer Protocol (HTTP) Simple Mail Transfer Protocol (SMTP) File Transfer Protocol (FTP) Telnet (Telnet) which lets you logon to remote computers Simple Network Management Protocol (SNMP)

3 TELNET

4 Telnet : DEFINITION Telnet is a telecommunications software utility which allows you to become a user on a remote computer. Once you access the remote terminal, you can use it for its intended purposes. Telnet utility does not allow you to transfer and save files to your own computer. Telnet usually works between different operating systems.

5 Telnet : DEFINITION The term "TELNET" also refers to the remote login that's possible on the Internet because of the TELNET Protocol. Telnet allows you to remotely access a computer over the Internet. - allows you to create, edit, execute and delete files just as if you were sitting at that computer.

6 Telnet : DEFINITION "Telnet to a host" means to establish a connection across the Internet from one host to another. Usually, you must have an account on the remote host to be able to login

7 Common uses of Telnet log on to a remote computer as a regular user with whatever privileges (you may have been granted) to the specific application and data :

8 Common uses of Telnet Connecting to a system to use specific programs such as and statistics applications Connecting to a networking device for information or configuration purposes e.g for trouble shooting Connecting to an online database of information e.g library catalogue Connecting to an online forum to interact and communicate

9 accessing library s OPAC the most popular application during the era of text based internet 1. telnet://locis.loc.gov :US Library of Congress 2. telnet://pac.carl.org : A system of US libraries Login: PAC (Choose VT100) 3. OLIS Perpustakaan UM telnet :// Username : OPAX

10 Example of Telnet to Library UM To set web permissions via telnet: 1. Click on the Start menu in the lower left corner of the screen. 2. Drag up to or select "Run" from the Start menu.

11 Example of Telnet to Library UM

12 Example of Telnet to Library UM

13 Basic commands in telnet : UNIX

14 Basic commands in telnet : UNIX

15 File Transfer Protocol (FTP)

16 Flies Transfer Protocol : FTP Discussion will cover: Definition Meaning and basic definition of ftp The concept of upload and download

17 FTP : DEFINITION FTP is a protocol that allow computers to communicate with each other across the Internet to arrange for the transfer of files from one computer to another FTP ('File Transfer Protocol') is a way to quickly upload and download files on the Internet.

18 FTP : DEFINITION Not all computers provide FTP service. Host (server) computers must run FTP server software to manage connections from client machines requiring FTP access to the server s files FTP provides clients with a window into the server that displays the files that can be copied to the client machine s storage media.

19 FTP : DEFINITION Typically a site on the Internet stores a number of files (they could be application executables, graphics, or audio clips, for example), and runs an FTP server application that waits for transfer requests. Some FTP servers are set up for private use, and access is controlled by a user name and password method.

20 FTP : DEFINITION To download a file to your own system, you run an FTP client application (example : WS FTP) that connects to the FTP server, and request a file from a particular directory or folder. Files can be uploaded to the FTP server, if appropriate access is granted. Many Internet Service Providers limit the size of attachments (around 5MB). Using FTP, you are only limited by the amount of space you are allocated on the server.

21 FTP : uses - Uploading files from PC to Server - Transfering files from PC to PC - Downloading software from server to PC

22 Benefits of FTP Quickly transfer large amounts of data between your clients, vendors, and anyone else who has an Internet connection and FTP client software. Reduce or eliminate the need to copy data on disks for overnight delivery, saving time and money. No need for expensive server software and static IP address to host your own site. Share your files with others securely. A user ID and password is needed to access your site.

23 Download & Upload Files can be transferred in either direction. "Downloading," refers to a transfer of a file from a remote computer to your computer "Uploading" refers to a transfer of a file from your computer to a remote computer

24 Download & Upload In order to upload or download a file by FTP, you need to do four things: 1.Login into a remote computer that has been configured as an FTP server. 2.Submit a username and a password to gain access to the remote system. 3.Change to the particular directory on the remote system which contains the file you wish to download or upload. 4.Transfer the file to or from the system in question.

25 Anonymous and Non-anonymous FTP There are two types of FTP "anonymous" "non-anonymous." The most widely used type is anonymous FTP. If a file is stored in an anonymous FTP directory virtually anyone with Internet access and an FTP program of some sort, even a web browser, can download the file. Uploading, on the other hand, is not usually possible with anonymous FTP.

26 Anonymous and Non-anonymous FTP Anonymous FTP is used primarily to give the Internet public download access to a particular directory of files. Anyone can download files from the directory, but only the "owner" of directory can upload to the directory. E.g downloading mp3 player from the host

27 THANK YOU