This Cisco C3KX-NM-10G 4-Port SFP 10G Expansion Module is designed to expand the capabilities of your 3750-X / 3560-X Switches. It is compatible with SFP Network Ports and made by the trusted brand, Cisco. With this module, you can easily increase the number of available network ports and improve the overall performance of your enterprise networking setup. Whether you need it for your office or data center, this module is a reliable addition to your switches and hubs.