Networking Protocols: FTP, TFTP & SFTP

Network Protocols:  FTP, TFPT & SFTP For this first lesson on Network Protocols we look at FTP, TFP and SFTP, these are file transfer protocols.  Their purpose is to move “physical” files to and from specific parties on the internet from a specific computer system on a network.  That’s accomplished by the exchange of security keys and packet labeling to assure the files being transmitted are received as sent and in a secure manner. Among other information, after completing this lesson, you’ll have learned the following about FTP, TFTP and SFTP: FTP typically runs over port 21 along which with other ports can be changed by an application for a more secure transmission. TFTP stands for “Trivial” FTP.  It typically runs over port 69 and it runs with UDP which means the files goes as quickly as possible to as many client computers as is possible with very little overhead. SFTP mean “Secure” FTP and it runs over port 22.  This is an encrypted file transmission protocol which SSH security. So that also means the sender and receiver each have encryption keys, indicating there is also an authentication-acknowledgement process that’s part of this FTP transmission even though this is a transmission with little overhead.   PLEASE NOTE: These and other network protocols are all generally port specific so accurately matching network protocols with their assigned port(s) will be essential to passing the A+ exam.  So use the IANA link to study them closely.
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