Official self-study test preparation guide for the Cisco SNRS exam 642-502 * Attack threats * Router management and administration * Authentication, Authorization, and Accounting (AAA) and Cisco Secure Access Control Server * RADIUS and TACACS+ * Cisco IOSR Firewall feature set * Securing networks with Cisco routers * Mitigating Layer 2 attacks * IPsec and Easy Virtual Private Network (VPN) * Security Device Manager (SDM)