What is the default Time to Live （TTL） valuse in Cisco FabricPath？（）

单项选择题Whichstatementbestdescribeswhatisdepictedintheshowcommandoutput？（）

A. IGMP snooping is not active for VLAN 120 because the IGMP feature has not been enabled on the switch with the feature igmp command.
B. The IGMP snooping querier for VLAN 120 is not in a running state because the Loopback interface configured with 1.1.1.1/32 is currently in a down state.
C. IGMP snooping has been disabled on the VLAN 120 SVI.
D. IGMP snooping has been disabled for VLAN 120 in VLAN configuration mode.
E. IGMP snooping is not active for VLAN 120 because VLAN 120 does not exist in the VLAN database.

单项选择题Nexus# sh ip igmp snooping vlan 120   IGMP Snooping information for vlan 120   IGMP snooping disabled   Optimised Multicast Flood （OMF） disabled   IGMP querier none  Switch-querier enabled， address 1.1.1.1， currently not running  IGMPv3 Explicit tracking enabled  IGMPv2 Fast leave disabled  IGMPv1 v2 Report suppression enabled  IGMPv3 Report suppression disabled  Link Local Groups suppression enabled  Router port detection using PIM Hellos， IGMP Queries  Number of router-ports： 0  Number of groups： 0   Active ports： Po100 Po111  Which statement best describes what is depicted in the show command output？（）

A. IGMP snooping is not active for VLAN 120 because the IGMP feature has not been enabled on the switch with the feature igmp command.
B. The IGMP snooping querier for VLAN 120 is not in a running state because the Loopback interface configured with 1.1.1.1/32 is currently in a down state.
C. IGMP snooping has been disabled on the VLAN 120 SVI.
D. IGMP snooping has been disabled for VLAN 120 in VLAN configuration mode.
E. IGMP snooping is not active for VLAN 120 because VLAN 120 does not exist in the VLAN database.

单项选择题Whatdoesthecommand IPARPsynchronize doinavPCconfiguration？（）

A. Synchronizes ARP entries between vPC peers every five minutes
B. Triggers a manual update of ARP entries from the primary peer to the secondary
C. Enables a bulk loading of ARP entries when a vPC peer is restored
D. Uses the peer-keepalive link to maintain ARP table consistency

单项选择题WhichoptiondescribesthedefaultrolesavailabletoRBAConCiscoNexusswitches？（）

A. admin， operator， network-admin， and network-operator
B. admin， read-only， network-admin， and network-operator
C. vdc-admin， vdc-operator， network-admin， and network-operator
D. vdc-admin， vdc-operator， network-admin， and network-operator （for Nexus 7000） and network- admin and network-operator （for other Nexus switches）
E. admin and read-only

单项选择题HowareIPmulticastIGMPentriessynchronizedbetweenvPCpeers？（）

A. IGMP is not synchronized between vPC peers
B. Cisco Fabric Service carries IGMP entries across the vPC peer link
C. IP ARP synchronization under the vPC domain configuration also synchronizes IGMP
D. IGMP is flooded to the L2 domain， and there is no need to synchronize it between vPC peers