Product Ourview
The Cisco Catalyst 3750-X Series and 3560-X Series Switches support four optional network modules for uplink ports. The default switch configuration doesn’t include the uplink module; at the time of switch purchase the customer has the flexibility to choose from the network modules.
C3KX-NM-10G
Two 10GbE SFP+ ports network module with four physical ports with two SFP+ and two regular SFP ports