Proficient in IP addressing, routing, subnets, VLANs, and VPNs. Skilled in managing network devices such as routers, switches, and firewalls. Experienced in implementing encryption, authentication, and authorization protocols. Familiar with firewalls, SSL/TLS, IPsec, and SSH for secure communication. Strong in access control, RBAC, MFA, and applying the principle of least privilege for secure user management.