单项选择题
A. It will only become active after a software failure.
B. It will only become active after a hardware failure.
C. It requires that Cisco NSF be enabled in order to work successfully.
D. It synchronizes the MAC, FIB, and adjacency tables between Active and Standby Route Processors.
单项选择题 Which of these statements is correct regarding SSO and Cisco NSF?（）
单项选择题 To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus?（）
单项选择题 When a router has to make a rate transition from LAN to WAN, what type of congestion needs should be considered in the network design?（）