anchor.diff:  
   ### <a id="registry"></a>Registry ###
   
  -When a VM is created, it has no "awareness" of its own IP address or other vital information, including:
  -
  -* an ID for the VM
  -* an ID for the volume reserved for the VM
  -* IDs for disks and other devices
  -* the network interface IP
  +VMs have no "awareness" of their own configuration information.
  +This includes IP addresses for the network interface, and IDs for the volume reserved for the VM, for the VM itself, and for disks and other devices.
   
   Agents obtain configuration information for their VMs in different ways, depending on cloud infrastructure.
   Some cloud infrastructures use the Registry for this purpose.
  
positive.code: 1. The Agent sends an information request to the Registry.
  1. The Registry responds by providing the requested information.
  1. The Agent uses the information to configure the VM.
  
  
  
negative.code: For internal communication between the VMs that it creates, BOSH allows named DNS records.
  This means that instead of an IP address, one component could communicate with another by a host and domain name, for example:
  
  `http://postgres-db.my-deployment.com`
  
  PowerDNS is the DNS server that BOSH runs if you use this feature.
  
  ### <a id="postgres"></a> Postgres database ###
  
  