GSNA Exam Dumps : GIAC Systems and Network Auditor

LogMiner requires a dictionary to translate object IDs into object names when it returns redo data to you. You have the following three options to retrieve the data dictionary: The Online catalog: It is the most easy and efficient option to be used. It is used when a database user have access to the source database from which the redo log files were created. The other condition that should qualify is that there should be no changes to the column definitions in the desired tables. The Redo Log Files: This option is used when a database user does not have access to the source database from which the redo log files were created and if there is any chances of changes to the column definitions of the desired tables. An operating system flat file: Oracle does not recommend to use this option, but it is retained for backward compatibility. The reason for not preferring the option is that it does not guarantee transactional consistency. LogMiner is capable to access the Oracle redo logs. It keeps the complete record of all the activities performed on the database, and the associated data dictionary, which is used to translate internal object identifiers and types to external names and data formats. For offline analysis, LogMiner can be run on a separate database, using archived redo logs and the associated dictionary from the source database.

Disabling SSID broadcast will free up bandwidth in a WLAN environment. It is used to enhance security of a Wireless LAN (WLAN). It makes difficult for attackers to find the access point (AP). It is also used by enterprises to prevent curious people from trying to access the WLAN.

According to the scenario, John wants to break the my_backup.tgz file into two files in which the size of the first file named my_backup.tgz.aa should be 600MB and that of the second file named my_backup.tgz.ab should be 200MB. Hence, he will use the the split --verbose -b 600 my_backup.tgz my_backup.tgz. command, which will automatically break the first file into 600MB named my_backup.tgz.aa, and the rest of the data (200MB) will be assigned to the second file named my_backup.tgz.ab. The reason behind the names is that the split command provides suffixes as 'aa', 'ab', 'ac', ..., 'az', 'ba', 'bb', etc. in the broken file names by default. Hence, both conditions, the file names as well as the file sizes, match with this command. Note: If the size of the tar file my_backup.tgz is 1300MB, the command split --verbose -b 600 my_backup.tgz my_backup.tgz. breaks the my_backup.tgz file into three files, i.e., my_backup.tgz.aa of size 600MB, my_backup.tgz.ab of size 600MB, and my_backup.tgz.ac of size 100MB.