© 2006 Cisco Systems, Inc. All rights reserved.ISCW v Module Summary The IKE protocol is a key management protocol standard used in conjunction with the IPsec standard. IPsec is used to create secure remote access VPNs. GRE is used to support non-IP protocols. GRE can be run inside IPsec for added security. SDM is an easy-to-use Internet browser-based device management tool that is embedded within the Cisco IOS 800– 3800 Series access routers at no cost. SDM has a unique Security Audit wizard that provides a comprehensive router security audit.

© 2006 Cisco Systems, Inc. All rights reserved.ISCW v Module Summary (Cont.) GRE is a tunneling protocol initially developed by Cisco that can encapsulate a wide variety of protocol packet types inside IP tunnels, creating a virtual point-to-point link to Cisco routers at remote points over an IP internetwork. The multiprotocol functionality is provided by adding an additional GRE header between the payload and the tunneling IP header. IPsec VPNs requiring high availability should be designed and implemented with redundancy in order to survive single failures. Cisco Easy VPN consists of two components: Cisco Easy VPN Server (can be configured using SDM) and Cisco Easy VPN Remote. The Cisco VPN client software can be used to enable Microsoft Windows operating systems to use native IPsec.

© 2006 Cisco Systems, Inc. All rights reserved.ISCW v1.04-3