试题详情
- 单项选择题Prior to 802.1w，Cisco implemented a number of proprietary enhancements to 802.1D to improve convergence in a Layer 2 network. Which statement is correct？（）
A、Only UplinkFast and BackboneFast are specified in 802.1w；PortFast must be manually configured.
B、Only PortFast is specified in 802.1w；UplinkFast and BackboneFast must be manually configured.
C、None of the proprietary Cisco enhancements are specified in 802.1w.
D、PortFast，UplinkFast，and BackboneFast are specified in 802.1w.
- D
关注下方微信公众号，在线模考后查看
热门试题