单项选择题 Compared to the traditional Layer 2 and Layer 3 system, how does the Cisco Catalyst 6500 VSS 1440simplify the network? （）

单项选择题 What is the correct sequence of commands to configure and verify SRM with SSO redundancy? （）

多项选择题 Which two differentiators make RSTP the preferred protocol for preventing Layer 2 loops in a switchednetwork environment?（） (Choose two.)