Which solution protects an individual network endpoint from attack?

Antivirus software directly protects an individual network endpoint, such as a computer or server, by detecting and removing malicious software. It operates locally on the device to prevent infections. A wireless controller manages multiple wireless access points and client connections, but doesn't directly protect individual endpoints from malware. A router connects different networks and forwards packets, providing network-level security like firewalls, but it doesn't protect a single endpoint from internal threats or downloaded malware. Cisco DNA Center is a network management and automation platform, not a direct endpoint protection solution.