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A. Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds.
B. Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds.
C. Distribution switches are single points of failure causing outages for the end devices.
D. Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than onesecond.
E. NSF and SSO with redundant supervisors have the most impact on outages at the accesslayer.

A. have the firewall and VPN appliance deployed in parallel
B. place the VPN in line with the firewall， with the VPN terminating inside the firewall
C. place the public side of the VPN termination device in the DMZ behind a firewall
D. place the VPN in line with the firewall， with the VPN terminating outside the firewall