saag-3----Page:9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
|
Three Security Layers Each Security Layer has unique vulnerabilities, threats Infrastructure security enables services security enables applications security 1 - Infrastructure Security Layer: Fundamental building blocks of networks services and applications Examples: Individual routers, switches, servers Point-to-point WAN links Ethernet links 2 - Services Security Layer: Services Provided to End-Users Examples: Frame Relay, ATM, IP Cellular, Wi-Fi, VoIP, QoS, IM, Location services Toll free call services 3 - Applications Security Layer: Network-based applications accessed by end-users Examples: Web browsing Directory assistance E-commerce |