Refer to the exhibit. Assume Router A is configured for split tunneling. If the Internet Service provider was asked by the customer to provide a guarantee of at least 60 percent of the WAN link between Router A and Router C for encrypted traffic, what would be the best means of identifying this traffic to their QoS Service Policy?（）

A.GRE can use transport mode and save up to twenty bytes per packet.
B.The corporate network includes many discontinuous blocks of IP networks and requires split tunneling.
C.The corporation's primary application is based on IP multicast.
D.Without GRE, there is no means to detect a head-end failure.
E.GRE would enable path MTU discovery.

A.Stateful Inspection Firewall
B.Intrusion Detection System
C.Spam Filtering 
D.802.1-based Authentication
E.Proxy Authentication
F.URL Filtering

A.allows for workstations to have network values hard-coded
B.IP network settings cannot be assigned if the VPN tunnel is down
C.provides IP network settings to be dynamically assigned
D.requires HTTP access to initiate assignment