Hi Ali,
Have a look at these links to get the view and details about LC and SC connectors
http://www.tech-faq.com/lc-connector.shtml
http://www.tech-faq.com/sc-connector.shtml
http://www.fiberc.com/connectors_LC.asp
http://www.fiberc.com/connectors_SC.asp
Talking about NATIVE VLAN is the vlan which is carried on trunk untagged which means no dot1q tagging is done on the vlan which is configured as Native vlan when moving out of the trunk port.
HTH, if yes please rate the post.
Ankur