This article covers CCNP ENCOR 350-401 security part, including access control, AAA (Authentication, Authorization, and Accounting), ACLs (Access Control Lists), and wireless security features like 802.1X and WebAuth. It also explores advanced security protocols such as Control Plane Policing (CoPP), REST API security, and endpoint protection strategies, alongside modern firewall technologies like Next-Generation Firewalls (NGFW), Cisco TrustSec, and MACsec.