Dr Billis assisting a SecureClient user who is not able to access resources in the VPN Domain.
Which of the following is NOT a possible cause for the user’s inability to access resources?

A.
A key-exchange protocol is initiated with the VPN-1/FireWall-1 Enforcement Module. The user’s
ISP may be blocking the protocol.

B.
SecureClient holds the first packet without transmitting it. If the user’s Internet connection is
very slow, the connection may be timed out.

C.
SecureClient challenges users for authentication. The user may be supplying an incorrect user
name or password.

D.
The VPN-1/FireWall-1 Enforcement Module pushes topology information to the SecureClient. If
the user’s is behind a NAT device, the Enforcement Module cannot push the topology.

E.
SecureClient examines the packet, to determine the responsible Enforcement Module. The user
may have supplied incorrect information about the Enforcement Module.