The CCNA Security exam (650-554 IINS) includes a section dedicated to the fundamental concepts of VPN technologies covering mainly 3 VPN methods: IPSec site to site on ISR (Integrated Service Routers) IOS, SSL-VPN clientless remote access on ASA firewall and SSL-VPN full tunnel remote access on ASA firewall.

In this eBook you will learn the basic properties of IPsec VPN, all various protocols involved in the creation of IPsec tunnels, how IPsec operates allowing 2 routers to successfully negotiate a tunnel and how to implement and to verify an IOS IPsec site-to-site VPN using PSK (pre-shared key) on a Cisco router. To successfully pass the exam, you will need to have full understanding of all these topics.