Network security focuses on protecting resources, applications and data in the network from unauthorized access – both internal and external. One tactic to protect your network is by using firewalls. The firewall also protects the network against other types of attacks, including brute-force attacks, malicious websites, etc. Network security tools also enable remote, authorized users to securely access the network resources they need.
Cloud security includes network security, as well as the security of services, containers, applications, and servers. It can also include aspects like data encryption, Multi-factor Authentication, malware prevention, monitoring and analysis, etc. It thus encompasses a greater section of the enterprise IT infrastructure, and a broader range of functions than network security.