More info
esxcfg-nics -l
Name=vmnic0
PCI=0000:00:14.00
Driver=Forcedeth
Link=Up
Speed=100Mbps
Duplex=Full
MAC Address=04:4b:80:80:80:03
MTU=1500
Description=nVidia Corpration nVidia Network Controller
esxcfg-vswitch –l
Switch Name Num Ports Used Ports Configured Ports MTU Uplinks
vSwitch0 128 4 128 1500 vmnic0
PortGroup Name VLAN ID Used Ports Uplinks
VM Network 0 0 vmnic0
Management Network 0 0 vmnic0