FTP - File Transmission Protocol

When should I upload in ASCII or Binary mode?
Upload in ASCII Upload in Binary

.htm, .html, .pl, .cgi, .shtml
.cnf, .php, .css , .forward
.htaccess, .map, .pwd, .txt
.grp , .ctl		 jpg, .gif , .class , .mid, .ra
.avi, .ocx, .mpg, .dat, .wav
.au
Tips:
Learn more about FTP, Visit tutorial section of this site.