Sulfur hexafluoride (SF 6) is an inorganic, colorless, odorless, non-flammable, extremely potent greenhouse gas which is an excellent electrical insulator. SF 6 has an octahedral geometry, consisting of six fluorine atoms attached to a central sulfur atom. It is a hypervalent molecule. SF 6 plasma is also used in the semiconductor industry as an etchant. 2  SF 6 breaks down in the plasma into sulfur and fluorine, the fluorine plasma performing the etching. 3  The magnesium industry uses large amounts of SF 6 as inert gas to fill casting forms. 4  Pressurizes waveguides in high-power microwave systems.
The Microsoft FTP Service 7.5 for IIS 7.0 helps you enable powerful publishing capabilities for your Web environment. 1  Details.
FTP is an underling of TCP and shuttles files back and forth between FTP server and FTP client. Because FTP requires that two ports be open--the server's and the client's--it facilitates the exchange of large files of information. First, you as client make a TCP control connection to the FTP server's port 21 which will remain open during the transfer process. In response, the FTP server opens a second connection that is the data connection from the server's port 20 to your computer.