心轨工作边至护轨工作边的最小间距,窄轨道岔规定,900mm轨距不小于()。
A. 552mm
B. 572mm
C. 574mm
D. 872mm
查看答案
The network administrator wants to enable an EtherChannel between two switches in "on" mode. The administrator connects the cables and enables the interfaces, but while configuring the EtherChannel in the first switch, a spanning-tree loop was detected. Which two of these procedures can avoid this problem?()
A. Configure the EtherChannel as "desirable" first.
B. Assign all interfaces to the same VLA
C. Disable PortFast on the interfaces in the EtherChannels.
Disable all interfaces first.
E. Fast Ethernet and Gigabit Ethernet ports cannot be assigned to the same EtherChannel.
Fix cabling problems.
预应力混凝土箱梁中,竖向预应力筋通常布置在箱梁的()。
A. 横隔板
B. 顶板
C. 腹板
D. 底板