Ok got confuzzed on below 
  
**** Unmanaged Gigabit Switch  or... Managed ?**** 
  
I actually don't see the word "Managed"...but the unmanaged threw me..  
  
Type of switch 
For simple 3 cameras, a Fast Ethernet (10/100) switch is fine.  However, these days, I prefer Gigabit (1000Mbps)...but it's more effective if you've switched the rest of your network over to Gigabit. 
  
Brand of switch 
D-Link, Cisco, Linksis, Netgear, TP-Link, Trendnet, Asus, Buffalo 
I've been fine with all those brands.