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Security Issues - Coggle Diagram
Security Issues
Data Backup and Recovery
Backing up data is a regular activity with the aim of making sure the current data on a system can be restored in case of disaster
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Restore points - a record of what the system looked like in the precise moment in time it was backed up
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Occurs when a comprehensive copy of all of the data in the system is backed up, this is used as the starting point for all types of backup
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Only small amounts of data change between backups, a lot of unnecessary files backed up
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Only files that have changed since any kind of backup are backed up, process begins with a full backup
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Takes the longest to restore as many versions of the same file exist and need to be sorted to find out which is the newest
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Disaster Recovery
The way in which an organisation recovers its systems from a catastrophic incident, this could be a natural events or deliberate acts.
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Every system needs a disaster recovery plan. This plan should be tested regularly and should minimise of offset the affects of disaster. it should identify:
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To develop a disaster recovery plan, a list of the parts of a system that will need restored must be developed, the recovery points objectives(RPOs) and the recovery time objectives(RTOs).
Once the RPOs are decided, the company must create a plan which will figure out the best way they can be achieved within the RTO deadline. Some common techniques are:
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Use of private, online storage for instant restoration of data
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Archiving Data
In any organisation, some data is required for immediate use, some isn't required at al or for future records, this data is archived
The main reason data is archived is the immediacy of availability, if it is not needed immediately, it can be archived and allow the system to operate at faster speeds.
Data archiving refers to moving data to a safe and secure location. it is important this data is kept for future reference, if needed in the future, the file you are looking for can be found using the index in which the data is stored in for easy finding of the data
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Data is not immediately available, so time has to be spent gathering it
Once located, access speeds may be poor
Restoring Systems
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The full system will need to be restored. This is easily performed and is done by replacing the existing files with the backed up versions from the most recent backup. The most time-efficient method
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The most up to date version of each file must be identified between the last full backup and the differential backup. This takes time to identify these files
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This is the most complex and lengthy way of backing up a system. You need to consider the full backup, and all of the incremental backups, in which there may be multiple versions of the same file, so these need to be compared to find out which is the most recent version. All incremental backup files also need to be checked as there may be a file that is in one of the interim backups