单选题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:（）Aproviding loop-free technology.Bproviding HSRP/VRRP.Cmanaging additional routing peers.Dmanaging two nodes and configuration.
单选题
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.
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