多项选择题
A. Design 1 is a looped triangle design.
B. Design 2 is a looped triangle design.
C. Design 2 achieves quick convergence using RSTP.
D. Both designs supportstateful services at the aggregation layer.
E. Design 2 is the most widely deployed in enterprise data centers.
单项选择题 What is the term for a logical SAN which provides isolation among devices physically connected to the same fabric?（）
单项选择题 Which technology allows centralized storage services to be shared across different VSANs?（）
单项选择题 Which of these statements is true of routing protocols in a hub-and-spoke IPsec VPN topology?（）
