A network protocol profile contains a pool of IPv4 and IPv6 addresses that vCenter Server assigns to vApps or to virtual machines with vApp functionality that are connected to port groups associated with the profile.
You can configure network protocol profile ranges for IPv4, IPv6, or both. vCenter Server uses these ranges to dynamically allocate IP addresses to the virtual machines within a vApp, when the vApp uses transient IP allocation policy.
Network protocol profiles also contain settings for the IP subnet, the DNS, and HTTP proxy servers.
Note: If you move a vApp or a virtual machine that retrieves its network settings from a protocol profile to another data center, to power on the vApp or virtual machine you must assign a protocol profile to the connected port group on the destination data center.