Network security is any activity designed to protect the usability and integnity of your network and data. It includes both hardware and software technologies. Effective types of network security: Not every user should have access to your network. To keep out potential attackers, you need to recognize each user and each device. Then you can enforce your security Policies. You can block noncompliant end point devices or give them only limited access. Network security is an organizations strategy that enables guaranteeing the security of its assets including all network traffic.