The main types of network security devices include firewalls, intrusion protection systems (IPS), unified threat management (UTM) systems, network access control (NAC), email security gateways, web application firewalls (WAF), and VPN gateways. Network Security devices are typically physical or virtualized hardware appliances, with vendor specific software installed. Occasionally, businesses purchase commodity server hardware and install custom software to create their own network security device. The nine key types include firewalls, IDPS, email security, NAC, VPNs, endpoint protection, DLP. Network security comprises technologies, processes, and purpose-built devices designed to safeguard an organization's network infrastructure from unauthorized access, exploitation of corporate resources, improper disclosure, and denial of services.
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