The five types of computer security are data security, network security, application security, user security, and physical security.Data security refers to the protection of data from unauthorized access or modification. This can be achieved through encryption, access control, data backup, and data recovery.Network security protects a computer network from unauthorized access and allows authorized users to access the network. This can be achieved through firewalls, intrusion detection systems, and VPNs.Application security protects software applications from attack and unauthorized access. This can be achieved through application whitelisting, application sandboxing, and application virtualization.User security protects users from malicious software and unauthorized access to their computer systems. This can be achieved through user authentication, user education, and user awareness.Physical security protects computers and networks from physical threats such as theft, fire, and water damage. This can be achieved through the use of security cameras, locks, and alarms.