Insert the following at end of 1.1@ renumbering the list items so that they follow in order from those in the existing text. This standard specifies protocols@ procedures@ and managed objects to support connectivity fault management. These allow discovery and verification of the path@ through bridges and LANs@ taken for frames addressed to and from specified network users@ and support detection and isolation of a connectivity fault to a specific bridge or LAN. To this end it: a) Defines Maintenance Domains@ Maintenance Associations@ their constituent Maintenance Points@ and the managed objects required to create and administer them; b) Describes the protocols and procedures used by Maintenance Points to detect and diagnose connectivity faults within a Maintenance Domain.