Which NetBackup process is responsible for reading data from the client during a backup?

bpbkar32 is the NetBackup backup process that runs on the client and is responsible for reading data from the client filesystem. It traverses directories, reads files, applies exclude/include lists, and sends the data stream to the NetBackup media server. bprd is the request daemon, bpcd is the client daemon that accepts connections, and bpbackup is a command-line utility that initiates backups but does not perform the actual data reading.