Cisco 2960 overview

I know for the 3560X series WS-C3750X-48P-S, if I need SFP uplink ports, I need to purchase a module (C3KX-NM-1G).  Do I need to purchase these network modules for the 3750X-12S-E, or does it already come with 12 SFP ports?  I'm a little confused looking at the datasheet.  I am going to have a total of eight 3560X series switches throughout a large facility.  All 3560X switches will have a fiber link to the 3750X-12S-E.  I see that the C3KX-NM-1G is also for the 3750X-12S-E, which sort of confused me because looking at the data sheet it says it has 12 SFP's.  I'm guessing this means it comes with 12 SFP ports and I don't need to purchase a C3KX-NM-1G modules for it right?

The solution:

It comes with the 12 SFP *ports*, but you need to buy the SFP's to load into the ports before you can connect a fibre.

You don't need to use the 3750X WS-C3750X-24S-Snetwork module slot unless:

- You need more 1G ports

- You want 10G uplinks

- You want Netflow or MacSec features.

More information about the SFP, please visit:http://ciscosfp.blogspot.com.