encryption / 2 switch-routers / Ethernet / ISDN / LAN / control network / broadband / Frame Relay / Fast Ethernet / Wireless Access / Firewall / IP Router / VPN / DSU/CSU / Command Line Interface / ADSL / The NetVanta switch-routers / Gigabit / Operating System / Quality of Service / Secure Shell / SSL / integral IP router / VOIP / WAN / IP access router / Class of Service / GUI / Gigabit Ethernet / /