1 What does shielded mean? - The connector shell is designed to help protect from any sort of electromagnetic interference from an outside source.

2 Type of Wall Plate? - Bulkhead wall plates will have Cat6 on the front and Cat6 on the rear.

3 What does D Series and Keystone mean? - This simply refers to the connector mounting holes used in the plate. The D Series type is a 3 hole design and connectors mount to the plate with machine screws. The Keystone type plates have Keystone holes and the connectors snap in.