单选题You are the network consultant from Cisco.com. Please point out the reason that STP required when VLANs do not span access layer switches.（）Aensure a loop-free topologyBprotect against user-side loopsCsupport business applicationsDrisk of lost connectivity without STP
单选题
You are the network consultant from Cisco.com. Please point out the reason that STP required when VLANs do not span access layer switches.（）
A
ensure a loop-free topology
B
protect against user-side loops
C
support business applications
D
risk of lost connectivity without STP
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