Cisco SAFE Small, Midsize, and Remote-User Networks (SMR) recommends a personal firewall software in the software access option if?

A.
He is not using a strong password on his PC.

B.
The user established a VPN tunnel.

C.
The used DSL service.

D.
The user does not establish a VPN tunnel.

Explanation:
Because the remote user may not always want the VPN tunnel established when connected to the Internet or ISP network, personal firewall software is recommended to mitigate against unauthorized access to the PC.
.REF;Safe white papers;28
SAFE: Extending the Security Blueprint to Small, Midsize, and Remote-User Networks