单项选择题

Which commands is necessary to permit SSH or Telnet access to a cisco switch that is otherwise configured for these vty line protocols?（）

A.transport type all
B.transport output all
C.transport preferred all
D.transport input all

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单项选择题

On the network 131.1.123.0/27, what is the last IP address that can be assigned to a host?（）

A.131.1.123.30
B.131.1.123.31
C.131.1.123.32
D.131.1.123.33

单项选择题

What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table（）。

A.The switch will not forward unicast frames.
B.The switch will forward the frame to a specific port.
C.The switch will return a copy of the frame out the source port.
D.The switch will remove the destination MAC from the switch table.
E.The switch will forward the frame to all ports except the port on which it was received.

多项选择题

Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network? （）

A.802.1d
B.VTP
C.802.1q
D.STP
E.SAP