Dynamic Port Binding

AC.

Dynamic port binding is a technique that enables a virtual machine to use a particular network port, and it is used in a virtualized environment where multiple virtual machines share the same physical network interfaces. When a virtual machine is started, it is assigned a virtual network interface card (vNIC), which is bound to a physical network interface card (pNIC) on the hypervisor host. Dynamic port binding allows the virtual machine to use the physical network interface card's available ports dynamically.

A. The port is connected when the VM is powered on and disconnected when the VM is powered off. This statement is not entirely true. Dynamic port binding is used to allocate network ports dynamically to virtual machines. When a virtual machine is started, it is assigned a virtual network interface card (vNIC), and the vNIC is bound to a physical network interface card (pNIC) on the hypervisor host. The physical network interface card's available ports are dynamically assigned to the virtual machine's vNIC based on the traffic demand. So, the port is not disconnected when the VM is powered off; it is available to be dynamically allocated to another virtual machine.

B. The port is created when the VM is powered on and destroyed when the VM is powered off. This statement is partially correct. When a virtual machine is started, a vNIC is created and bound to a pNIC on the hypervisor host. The physical network interface card's available ports are dynamically allocated to the virtual machine's vNIC based on traffic demand. When the virtual machine is shut down, the vNIC is destroyed, and the physical network interface card's ports are released and available for dynamic allocation to another virtual machine.

C. The max-port limits are enforced. This statement is true. The maximum number of ports that can be allocated to a virtual machine can be configured on the hypervisor host, and the hypervisor host enforces this limit to ensure that the available physical network interface card's ports are shared appropriately among the virtual machines.

D. The max-port limits are not enforced. This statement is false. The maximum number of ports that can be allocated to a virtual machine can be configured on the hypervisor host, and the hypervisor host enforces this limit to ensure that the available physical network interface card's ports are shared appropriately among the virtual machines.

E. The port is always connected. This statement is not entirely true. Dynamic port binding allows the physical network interface card's available ports to be dynamically allocated to the virtual machine's vNIC based on traffic demand. If there is no traffic demand, the port may not be used, and another virtual machine can use the physical network interface card's available ports.