單項(xiàng)選擇題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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1.多項(xiàng)選擇題In a RSTP implementation, which of the following two link types are used? ()(Choose two.)

A. Shared
B. Point-to-Point
C. Designated
D. Multiaccess non-broadcast

3.單項(xiàng)選擇題What is the function of the no switchport catalyst switch interface configuration command?()

A. Disables the interfaces to prevent traffic flow
B. Clears all the configurations on the interface
C. Switches the port from access mode to trunk mode
D. Converts the port from physical Layer 2 port to physical Layer 3 port

5.單項(xiàng)選擇題As a network administrator, you issue the interface auto qos voip cisco-phone command on a port in an edge network. It is possible for a Cisco Catalyst switch to check if a Cisco IP Phone is directly attached to that port by:()

A. using DHCP snooping
B. snooping the incoming 802.1Q VLAN tag
C. using CDP
D. snooping the CoS marking on the incoming frames