The surrounding text describes the initialization parameter settings for the Data Guard configuration in this illustration. Log apply services and standby redo log files are inactive on the Boston primary database, and redo transport services and online redo log files are inactive on the Chicago physical standby database. The Denver logical standby database is generating redo data and storing it on local archived redo log files (configured as the LOG_ARCHIVE_DEST_1=LOCATION=/arch1/denver destination). In addition, the Denver logical standby database is storing redo data it receives from the primary database in archived redo log files (configured as the LOG_ARCHIVE_DEST_2=LOCATION=/arch2/denver destination).