The DHCP\Parameters subkey contains <Option#> subkeys, which store configuration data for options that the client can request from the DHCP server by using DHCP Manager.
Most of the entries described in this file as being stored in the <Option#> subkey can appear in any of the subkeys in the Options subkey.
The <Option#> subkey is a variable representing the subkeys in the DHCP\Parameters\Options subkey. It doesn't actually appear in the registry. The <Option#> subkey displays the entries and subkeys that are common to many of the subkeys in the Options subkey.