Introduction to Network Security
Identifying potential risks to network security

A risk analysis should identify the risks to the network, network resources, and data. The intent of a risk analysis is to identify the components of the network, evaluate the importance of each component, and then apply an appropriate level of security. This helps to maintain a workable balance between security and required network access.

Asset Identification
Before the network can be secured, the individual components that make up the network must be identified. An asset inventory needs to be created. All of the network devices and endpoints, such as hosts and servers, should be included in the asset inventory. Once the inventory is complete, the components can be prioritized and assessed for vulnerabilities.

Vulnerability Assessment
Once the network components have been identified, they can be assessed for vulnerabilities. These vulnerabilities could be weaknesses in the technology, configuration, or security policy. Any vulnerability that is discovered will need to be addressed to mitigate any threat that could take advantage of the vulnerability. Vulnerabilities can be fixed by various methods, including applying software patches, reconfiguring devices, or deploying countermeasures, such as firewalls and anti-virus software.

Threat Identification
A threat is an event that can take advantage of a vulnerability and cause a negative impact on the network. Potential threats to the network need to be identified, and the related vulnerabilities need to be addressed to minimize the risk of the threat.