Thank you for your reply
We plan to install vmware esx on the server as a virtual instrument and use mikrotik as the operating system for virtual machines .
This plan requires that the data center network support from bridged mode .
Bridged mode lets the virtual machine share the host's Ethernet connection, while appearing as a separate machine with its own MAC and TCP/IP address .
NAT mode nats through the hosts NIC, much like the 192.168.1.x machines nat through your router to the internet .
The VMware assigns DHCP addresses to the virtual network cards, and the NAT system takes it from there through the real NIC .