XFP transceiver interface type mainly by the four, namely: SC, FC, ST, LC. Here we look at the next four kinds of interface 
XFP transceiver features and accessories.
1.SC card type (the most used on the router switch)

Matching jumper: SC fiber jumpers
2.FC round with thread (the most used on the patch panel)
FC fiber jumpers
3.ST card-type round 
XFP transceiver
ST fiber jumpers
4.SFP small package 
XFP transceiver, the use of fiber for the LC type
Matching fiber jumpers: 
SFP transceiver is used 
SFP module plug the way, so the matching fiber jumpers and 
SFP module connected to the LC fiber jumper.