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单项选择题

Which of these is true regarding the configuration and application of port access control lists？ （）

A.PACLs can be applied in the inbound or outbound direction of a Layer 2 physical interface. 
B.At Layer 2， a MAC address PACL will take precedence over any existing Layer 3 PACL.
C.When you apply a port ACL to a trunk port， the ACL filters traffic on all VLANs present on the trunk port.
D.PACLs are not supported on EtherChannel interfaces.

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热门试题

单项选择题WhenconfiguringprivateVLANs，whichconfigurationtaskmustyoudofirst？（）

A.Configure the private VLAN port parameters.
B.Configure and map the secondary VLAN to the primary VLAN.
C.Disable IGMP snooping.
D.Set the VTP mode to transparent.

多项选择题PrivateVLANScanbeconfiguredaswhichthreeoftheseporttypes？（）

A.isolated
B.protected
C.private
D.associated
E.promiscuous
F.munity

多项选择题Whatarethreeresultsofissuingtheswitchporthostcommand？（）

A.enables PortFast
B.disables trunking
C.disables Cisco Discovery Protocol
D.enables port security
E.enables loopguard
F.disables EtherChannel

单项选择题You are implementing basic switch security best practices.  Which of these is a tactic that you can use to mitigate compromises from being launched through the switch？（）

A.Make all ports private VLAN ports.
B.Place all unused ports in native VLAN 1 until needed.
C.Proactively configure unused switch ports as access ports.
D.Disable Cisco Discovery Protocol globally.

单项选择题Three Cisco Catalyst switches have been configured with a first-hop redundancy protocol. While reviewing some show commands， debug output， and the syslog， you discover the following information： What conclusion can you infer from this information？（）

A.VRRP is initializing and operating correctly.
B.HSRP is not properly exchanging three hello messages.
C.VRRP is not properly exchanging three hello messages.
D.HSRP is initializing and operating correctly.
E.GLBP is not properly exchanging three hello messages. 
F.GLBP is initializing and operating correctly.