I'm looking for Cisco switches that provide 48 Gigabit ports. I've been through this list : CISCO PRODUCT REFERENCE and this one: DETAIL 3750 SWITCHES
But there's something I don't understand:
WS-C3750G-48TS-S
• 48 Ethernet 10/100/1000 ports
• 4 SFP-based Gigabit Ethernet ports
If there are 48 Gigabit ports, what is the use for 4 SFP-based ports ?
Also, does Cisco sells these 3750 switches in different versions like 10M / 100M / 1G ?
Thanks