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Flex Links are a pair of a Layer 2 interfaces (switchports or port channels), where one interface is configured to act as a backup to the other. Which two statements are correct regarding Flex Links?（）
A. An interface can only belong to single Flex Links.
B. An interface can belong to multiple Flex Links.
C. Flex Links operate only over single pairs of links.
D. Flex Links automatically disable STP so no BPDUs are propagated.
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更多 “ Flex Links are a pair of a Layer 2 interfaces (switchports or port channels), where one interface is configured to act as a backup to the other. Which two statements are correct regarding Flex Links?（）A. An interface can only belong to single Flex Links.B. An interface can belong to multiple Flex Links.C. Flex Links operate only over single pairs of links.D. Flex Links automatically disable STP so no BPDUs are propagated. ” 相关考题
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After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"()
A.Layer 1 on the interface is up but Layer 2 is down.B.Layer 2 on the interface is up but Layer 3 has not been configured.C.The interface is administratively up but the link status is down.D.The interface is up but has been administratively turned off.
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Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?()
A. IGMPB. IGMP snoopingC. PIM - DMD. DVMRPE. MOS PF
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In a Cisco Unified Computing System， where are SAN port channels connected to？（）A、 Only to Cisco Fibre Channel switchesB、 Only to Cisco Fibre Channel switches in NPIV modeC、 To any Fibre Channel switchD、 Directly to storage arraysE、 Only to Nexus Switches
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Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?（）A、IGMPB、IGMP snoopingC、PIM - DMD、DVMRPE、MOS PF
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Why would a network administrator configure port security on a switch?（）A、To prevent unauthorized Telnet access to a switch port.B、To limit the number of Layer 2 broadcasts on a particular switch port.C、To prevent unauthorized hosts from accessing the LAN.D、To protect the IP and MAC address of the switch and associated ports.E、To block unauthorized access to the switch management interfaces over common TCP ports.
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Which two of the following statements describe a routed switch port on a multilayer switch？（）A、Layer 2 switching and Layer 3 routing are mutually supported.B、The port will not be associated with any VLAN.C、The routed switch port supports VLAN subinterfaces.D、The routed switch port is used when a switch has only one port per VLAN or subnet.E、The routed switch port ensures that STP remains in the forwarding state.
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A virtual port channel （vPC） allows links that are physically connected to two different Cisco Nexus devices to appear as a single port channel to a third device. Which are the mandatory steps for configuring vPC？ （） A、 Enable feature vPCB、 Define domainsC、 Establish peer keepalive connectivityD、 Create a peer linkE、 Configure the peer link as a trunk portF、 Create port channels and vPCsG、 Define port channel load-balancing methodH、 Make sure configurations are consistent
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You have configured a Cisco Catalyst switch to perform Layer 3 routing via an SVI and have assigned that interface to VLAN 20. To check the status of the SVI， you issue the show interfaces vlan 20 command at the CLI prompt. You see from the output display that the interface is in an "up/up" state. What must be true in an SVI configuration to bring the VLAN and line protocol up？（）A、The port must be physically connected to another Layer 3 device.B、At least one port in VLAN 20 must be active.C、The Layer 3 routing protocol must be operational and receiving routing updates from neighboring peer devices.D、Because this is a virtual interface， the operational status will always be in an "up/up" state.
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When building a NIC team （virtual port channel） between a host and a pair of Cisco Nexus 5000 Series Switches that will carry FCoE traffic， what is the maximum number of physical links that can exist in the team？（）A、 1B、 2C、 4D、 5E、 16
考题
Flex Links are a pair of a Layer 2 interfaces (switchports or port channels), where one interface is configured to act as a backup to the other. Which two statements are correct regarding Flex Links?（）A、An interface can only belong to single Flex Links.B、An interface can belong to multiple Flex Links.C、Flex Links operate only over single pairs of links.D、Flex Links automatically disable STP so no BPDUs are propagated.
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which one of the following best where layer can be used?（）A、form B、page C、subform D、all of the above
考题
What does a Layer 2 switch use to decide where to forward a received frame?（）A、source MAC addressB、source IP addressC、source switch portD、destination IP addressE、destination port addressF、destination MAC address
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What is the function of the no switchport catalyst switch interface configuration command?（）A、Disables the interfaces to prevent traffic flowB、Clears all the configurations on the interfaceC、Switches the port from access mode to trunk modeD、Converts the port from physical Layer 2 port to physical Layer 3 port
考题
Which two statements are correct regarding Flex Links？ （）A、 An interface can belong to multiple Flex Links.B、 Flex Links operate only over single pairs of links.C、 Flex Link pairs must be of the same interface typeD、 Flex Links automatically disable STP so no BPDUs are propagatedE、 Failover from active to standby on Flex Links takes less than a second
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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.
考题
What is the most common cause of network congestion？（）A、aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switchesB、speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environmentC、flapping Ethernet interfaces caused by misconfigured LAN interfacesD、flapping serial interfaces caused by misconfigured WAN interfacesE、speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment
考题
Which statement about SAN port channels configured on Cisco Nexus 5000 Series Switches is true？（） A、 A single SAN port channel can have both Fibre Channel and virtual Fibre Channel interfaces. B、 SAN port channels can include up to 16 interfaces.C、 SAN port channels distribute traffic across all links in the port channel when source ID and destination ID load balancing are used.D、 The links in SAN port channels can be connected to different sets of switches.E、 The On mode of operation means ports only operate as part of a SAN port channel or remain inactive.
考题
单选题What is the most common cause of network congestion？（）A
aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switchesB
speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environmentC
flapping Ethernet interfaces caused by misconfigured LAN interfacesD
flapping serial interfaces caused by misconfigured WAN interfacesE
speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment
考题
单选题You have configured a Cisco Catalyst switch to perform Layer 3 routing via an SVI and have assigned that interface to VLAN 20. To check the status of the SVI， you issue the show interfaces vlan 20 command at the CLI prompt. You see from the output display that the interface is in an "up/up" state. What must be true in an SVI configuration to bring the VLAN and line protocol up？（）A
The port must be physically connected to another Layer 3 device.B
At least one port in VLAN 20 must be active.C
The Layer 3 routing protocol must be operational and receiving routing updates from neighboring peer devices.D
Because this is a virtual interface， the operational status will always be in an up/up state.
考题
多选题Flex Links are a pair of a Layer 2 interfaces (switchports or port channels), where one interface is configured to act as a backup to the other. Which two statements are correct regarding Flex Links?（）AAn interface can only belong to single Flex Links.BAn interface can belong to multiple Flex Links.CFlex Links operate only over single pairs of links.DFlex Links automatically disable STP so no BPDUs are propagated.
考题
多选题A virtual port channel （vPC） allows links that are physically connected to two different Cisco Nexus devices to appear as a single port channel to a third device. Which are the mandatory steps for configuring vPC？ （）AEnable feature vPCBDefine domainsCEstablish peer keepalive connectivityDCreate a peer linkEConfigure the peer link as a trunk portFCreate port channels and vPCsGDefine port channel load-balancing methodHMake sure configurations are consistent
考题
单选题Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?（）A
IGMPB
IGMP snoopingC
PIM - DMD
DVMRPE
MOS PF
考题
单选题When building a NIC team （virtual port channel） between a host and a pair of Cisco Nexus 5000 Series Switches that will carry FCoE traffic， what is the maximum number of physical links that can exist in the team？（）A
1B
2C
4D
5E
16
考题
单选题Which statement about SAN port channels configured on Cisco Nexus 5000 Series Switches is true？（）A
A single SAN port channel can have both Fibre Channel and virtual Fibre Channel interfaces. B
SAN port channels can include up to 16 interfaces.C
SAN port channels distribute traffic across all links in the port channel when source ID and destination ID load balancing are used.D
The links in SAN port channels can be connected to different sets of switches.E
The On mode of operation means ports only operate as part of a SAN port channel or remain inactive.
考题
单选题Why would a network administrator configure port security on a switch?（）A
To prevent unauthorized Telnet access to a switch port.B
To limit the number of Layer 2 broadcasts on a particular switch port.C
To prevent unauthorized hosts from accessing the LAN.D
To protect the IP and MAC address of the switch and associated ports.E
To block unauthorized access to the switch management interfaces over common TCP ports.
考题
单选题What dose a Layer 2 switch use to decide where to forward a received frame?（）A
source MAC addressB
source IP addressC
source switch portD
destination IP addressE
destination port addressF
destination MAC address
考题
多选题Which two statements are correct regarding Flex Links？ （）AAn interface can belong to multiple Flex Links.BFlex Links operate only over single pairs of links.CFlex Link pairs must be of the same interface typeDFlex Links automatically disable STP so no BPDUs are propagatedEFailover from active to standby on Flex Links takes less than a second
考题
多选题Which two of the following statements describe a routed switch port on a multilayer switch？（）ALayer 2 switching and Layer 3 routing are mutually supported.BThe port will not be associated with any VLAN.CThe routed switch port supports VLAN subinterfaces.DThe routed switch port is used when a switch has only one port per VLAN or subnet.EThe routed switch port ensures that STP remains in the forwarding state.
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