A new technician at a rural fiber cooperative asks which Junos daemon on the Routing Engine is responsible for accepting an administrator's CLI session, validating configuration syntax, and committing configuration changes. Which daemon handles this function?

The management process, mgd, is the Junos daemon that handles command-line interface sessions and configuration management: it parses commands, validates configuration syntax against the schema, and processes commit operations that move a candidate configuration into the active configuration. Because Junos separates functions into distinct daemons, mgd's job is specifically the administrative interface layer, not the routing or hardware layers underneath it. The distractors attribute this job to daemons with unrelated responsibilities: the routing protocol process only concerns itself with protocol adjacencies and route computation, regardless of how a change reached it; the chassis process reports on physical component health and does not process configuration syntax; and while interface settings are indeed entered through the same interface, it is mgd that accepts and validates that input, after which the resulting configuration change is later applied by the relevant daemon, such as the device control process for interfaces specifically. Recognizing mgd's role helps separate who takes the administrator's input from who acts on the resulting configuration. A useful conceptual check is that a syntax error in a configuration stanza is caught at the administrative layer before it ever reaches a hardware- or routing-specific daemon.