S5500-28C-EI:

24 10/100/1000 BASE-T Ethernet port

4 SFP Gigabit ports (Combo)

two extension slots.

Switching capacity

(Full duplex)
 128 Gbps

 
Throughput
 95.2 Mpps

 
Management port
 1 console interface
 
Service ports
 24 10/100/1000 BASE-T Ethernet ports, 4 Gigabit SFP ports (Combo)

 
Extension slot
 2 extension slots
 
Optional interface modules
1-port 10GE XFP interface module

2-port 10GE XFP interface module

2-port 10GE CX4 interface module

2-port SFP interface module
 

Support up to 9 stacking devices