What two things must you have in order to use ftp?
a. e-mail client and ftp client
b. e-mail client and server
c. files and server
d. ftp client and server

In order to use the file transfer protocol, you need to first have an FTP server, and then an FTP client who accesses that server. The FTP server is what stores all of the directory trees, and manages connections between it and each client. The FTP client is what is used to interface with the FTP server, examples of this being Cyberduck and FileZilla. 

Well, this code would box the whole body of an html document. by using the relative value for position, you are telling it to position relative to its normal position, which the top left corner is at (0,0). by using left: 50px, you are telling the box to set the left margin  edge to 50px and by using top: 50px, you are telling it to set the top margin edge to 50px. by doing this shifting, the top left corner of the box, which is at (0,0) would be positioned at (50,50)