Which feature enforces the corporate policy for Internet access to Cisco AnyConnect VPN users?

I’ll buy that for $1

“Trusted Network Detection (TND) gives you the ability to have AnyConnect automatically disconnect a
VPN connection when the user is inside the corporate network (the trusted network) and start the VPN
connection when the user is outside the corporate network (the untrusted network). This feature
encourages greater security awareness by initiating a VPN connection when the user is outside the
trusted network.” – http://www.cisco.com/c/en/us/td/docs/security/vpn_client/anyconnect/anyconnect31/administration/guide/anyconnectadmin31/ac03vpn.pdf