Which technology will allow a user’s VMs to accept incoming traffic the Internet?

A user has been assigned a single external IP address that connects to the Internet. The user has
a vApp containing 4 VMs deployed in the Organization VDC. Which technology will allow a user’s
VMs to accept incoming traffic the Internet?

A.
Firewall Rules

B.
Port Forwarding

C.
IP Translation

D.
1:1 NAT