In comparison with traditional Layer 2 and Layer 3 system, Cisco Catalyst 6500 Virtual Switching System (VSS) 1440 simplifies a network by the means of:（）
- A、providing loop-free technology.
- B、providing HSRP/VRRP.
- C、managing additional routing peers.
- D、managing two nodes and configuration.
正确答案:A
答案解析:有
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