This is the rn (Relative Name), the single naming segment that, appended to its parent's dn, forms the full dn for this one instance of an endpoint object recording one specific request submitted to the identity subsystem (for instance, a request to allocate a new system/domain identity value). UCS Manager derives this segment automatically from the object's own defining attribute (such as an address, index, or configured name), so seeing a distinctive rn like this is how you tell one RequestEp row apart from every sibling row under the same parent. For this class the rn typically looks like 'req-2071'.