6.4.5+Network+Security

=__**Network Security and how it is accheived**__=

Network security is very important, because it prevents the transeferred data to be stolen or illegally edited

There are four main ways to protect one's network
 * 1) **Access control**
 * 2) **Layered Access**
 * 3) **A Firewall**
 * 4) **Data Encyption**

__**Access Control**__
 * Access Control is the part of the operating system that allows people to login into a system and that determines what rights the user has
 * Much like Layered Access there are different amounts data one can access depending on the amount of rights one has
 * It also denies the accessfor people who give an incorrect password

__**Layered Access**__
 * Layered Access means that there are several layered of permissions. eg: Administrator > User > Guest
 * The idea is that you gain more access to get more sensitive data or commands

__**Firewall**__
 * The firewall is also very important because it blocks unotharised access to the computer while allowing the user to still access the files it needs
 * A firewall cheks all the packaages that try to acces the computer to determine if it is dangerous or has the correct authority

__**Data Enycption**__
 * Data encyption is the process of encypting data that is very sensitive and that can only be accessed with the use of a key
 * The data that is encypted can not be read by anyone without the key even if it is intercepted.

Created by: Daniel Gillo Last update: 13th December 2010

Sources:
 * Jones, Richard. Computer Science Java Enabled. Victoria: IBID Press, 2004.
 * "Firewall (computing)." 12 December 2010.  Wikimedia.org. 13 December 2010.