单选题Which of these statements is correct regarding SSO and Cisco NSF？（）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.
单选题
Which of these statements is correct regarding SSO and Cisco NSF？（）
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.
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