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Network and Data Security Levels

1#Confidentiality 

The first term of data security is known as confidentiality, which is concerned with who could access or view the data. In addition, the data will appear only for one or group of people who have the privilege to discover that information. Whereas unauthorized people will not be able to access information due to privileges. In certain security environments, all individuals have one level of access to viewing data, whereas there is no need to discriminate between users to separate or isolate the information. In other instances, there are multiple layers of confidentiality, which hierarchical security schemes are required to apply to the individual or groups. Each level has a certain class to access data. In some instances, some that do not need to apply confidentiality are "unclassified".However, there is data considered secret or top-secret, each class requires a specific privilege to access.
2#Integrity 
The second term of data security is known as Integrity. In the previous term, we talk only about accessing data or viewing data and users can only explore the data without any modification on it. Integrity has the same functionality as confidentiality, but accessible users could make modifications to that data either by addition or deleting, or moving the data. The Integrity will ensure that data correctness and accuracy by blocking unauthorized individuals to do any kind of modification. There are a number of tools that protect organizations or systems from being attacked from inside or outside that premises. such as using firewall devices, human monitoring the network for suspicious activity, and Access Control list privileges. Data integrity is the concept of ensuring that the data is not being tampered with or damaged by mistake or intentionally. Each accessible user has certain privileges to make modifications, but when that happens, it will register on the log file with an indication of the name or id of the user that made that modification.
3#Availability 
The third term of data security is known as availability. the availability allows that authorized users to access data whenever they want and ensure that data are reachable. Which takes care of physical and data impacts. That physical impact such as ensuring that the power is available to that system all day considering that backup power and other physical impacts are natural disasters such as earthquakes, hurricanes, etc. In the case of physical impacts, selecting the location of data centers is very important. In the case of data impacts, the most familiar terms in this section are called redundant networks or data. Redundant networks are focused on preparing alternative paths to access data in case of access to the main path is a failure, where the switching is done automatically. Whereas, the redundant database concentrates on providing an extra one or more databases to back up the main one. The Availability is to ensure that data or apps will be available and ready for users whenever.

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