Textual conventions for NBS mibs. Some informal NBS conventions used include the following: A DESCRIPTION specifying 'Persistent' indicates a user- configured attribute that can be stored in the Agent's non-volatile file system as a configuration file such as 'startup-config'. A DESCRIPTION specifying 'Impulse' indicates a user setting that the Agent will immediately attempt but will not store persistently. An object name containing 'Admin' indicates a setting requested by the user which may be overridden by the system. Admin objects should be updated in the Agent immediately, so a GET request immediately after the SET is accepted will be answered with a GET-RESPONSE indicating the new value. An object name containing 'Oper' indicates an attribute's actual state. An object name containing 'Caps' is a bitmask which refers to the capabilities of an entity to support corresponding entries in a specified feature table.