If the IP address or host name of a name server needs to be changed, do all the domains and network records associated with the host need to be updated?

Fortunately, no! Once the IP address or host name of a server is updated, all domains and network records associated with the host will be automatically updated. This occurs because both the name and IP address of a name server are associated with a handle in the InterNIC database, and all domain and network records are associated with the handle of a host. Even if the name of the host or the IP address of the host changes, the handle of the host does not change.