"I want to buy Catalyst 2960-X series switches like WS-C2960X-24PS-L,WS-C2960X-24PD-L, buy I'm not very well know about c2960x series. Can someone help me ?"--from yahoo answer.
All Catalyst 2960-X Series Switches use a single Universal Cisco IOS Software Image for all SKUs.Cisco Catalyst 2960-X Family of Switches are available with the LAN Base and LAN Lite feature sets.
Catalyst 2960-X 24 GigE PoE 370W, 4 x 1G SFP, LAN Base Switch
Catalyst 2960-X 24 GigE PoE 370W, 2 x 10G SFP+, LAN Base Switch
If you buy the LAN Base model, you'll have all of Cisco's normal switching features and options. My company has purchased many of these switches, and they work very well. Remember, these are access layer switches. If you're looking for something to be an aggregate switch for things that push a lot more data (ex. several wireless controllers), you'll want to go for something more powerful.