vSphere Standard Switch

Hi,

1). What is the maximum vSphere standard switch can be created on a host ?

2). Configuration maximum for = Total virtual network switch ports per host (VDS and VSS ports) - 4096

      My understanding on the question no 2 is maximum port on a host is 4096 and per vSwitch we can create 4088.

     I am adding two virtual switch on a host and each switch with 4088 port. My question is maximum port per host is 4096 so how i am able to add 2 switch with 4088.

3) what is the actual purpose of overhead or reserved port for virutual switch ? still confused after red the KB 1008040.