单选题In a high-availability network, which command, when placed on ports that have connected end stations, will allow you to prevent delays in service for end stations by placing a port in blocking mode?（）Aenable backbone fastBenable uplink fastCdisable portfastDenable portfast
单选题
In a high-availability network, which command, when placed on ports that have connected end stations, will allow you to prevent delays in service for end stations by placing a port in blocking mode?（）
A
enable backbone fast
B
enable uplink fast
C
disable portfast
D
enable portfast
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