Which of these correctly identifies a difference between the way BPDUs are handled by 802.1w and 802.1D？ （）

A . PIM join messages are sent every 60 seconds to refresh the upstream router’s mroute state for the multicast tree. B . Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router. C . PIM join messages are only sent when the multicast distribution tree is first being established. D . PIM join messages are sent every three minutes to refresh the upstream router’s mroute state for the multicast tree.

A .  An ACL can be applied to multiple interlaces. B .  An ACL wildcard mask is identical to an IP subnet mask. C .  There may be multiple ACLs per protocol， per direction， and per interface. D .  There is an "implicit deny" at the end of an ACL and will result in a dropped packet. E .  An ACL acts on all packets， those flowing thru the router and those originated by the router itself. F .  An ACL will be processed from top to bottom and may have multiple matches that will act on the packet that is being tested.

A . On the CE router, PE neighbors must be configured in the VRF context on the CE router B . On PE routers, the CE IBGP neighbors are configured in the global BGP configuration C . On PE routers, the CE EBGP neighbors are configured in the VRF context D . A separate BGP process must be used on the PE routers for CE routers so that they do not use the same BGP routing process as that used for the PE router's other provider neighbor

A .  It will only become active after a software failure. B .  It will only become active after a hardware failure. C .  It requires that Cisco NSF be enabled in order to work successfully. D .  It synchronizes the MAC·， FIB·， and adjacency tables between Active and Standby RouteProcessors.

A . 802.1Q native VLAN frames are untagged by default. B . 802.1Q trunking ports can also be secure ports. C . 802.1Q trunks can use 10 Mb/s Ethernet interfaces. D . 802.1Q trunks require full-duplex， point-to-point connectivity. E . 802.1Q trunks should have native VLANs that are the same at both ends.

A . The IOS default is for a last-hop router to trigger a switch to the shortest path tree as soon as a new source is detected on the shared tree. B . The IOS default is for every one of the routers on the shared tree to trigger a switch to the shortest path tree as soon as a new source is detected on the shared tree. C . The default behavior of switching to the shortest path tree as soon as a new source is detected on the shared tree can be disabled by setting the value in the ip pim spt-threshold command to "infinity." D . The default behavior of switching to the shortest path tree as soon as a new source is detected on the shared tree can be disabled by setting the value in the ip pim spt-threshold command to "zero.&quot

A . Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds. B . Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds. C . Distribution switches are single points of failure causing outages for the end devices. D . Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than one second. E . NSF and SSO with redundant supervisors have the most impact on outages at the access layer.

A . 802.1Q native VLAN frames are untagged by default. B . 802.1Q trunking ports can also be secure ports. C . 802.1Q trunks can use 10 Mb/s Ethernet interfaces. D . 802.1Q trunks require full-duplex, point-to-point connectivity. E . 802.1Q trunks should have native VLANs that are the same at both ends.

A . supports multiple protocols B . works only in a shared or loop environment C . allows addressing for up to 4 million nodes D . allows addressing for up to 8 million nodes E . provides a high speed transport for SCSI payloads F . may stretch to a distance of up to100 km before needing extender

A . EIGRP for IPv6 is directly configured on the interfaces over which it runs. B . EIGRP for IPv6 is not configured on the interfaces over which it runs， but if a user uses passive-interface configuration， EIGRP for IPv6 needs to be configured on the interface that is made passive. C . There is a network statement configuration in EIGRP for IPv6， the same as for IPv4. D . There is no network statement configuration in EIGRP for IPv6. E . When a user uses a passive-interface configuration， EIGRP for IPv6 does not need to be configured on the interface that is made passive. F . When a user uses a non-passive-interface configuration， EIGRP for IPv6 does not need to be configured on the interface that is made passive

A .  It will only become active after a software failure B .  It will only become active after a hardware failure C .  It requires that Cisco N3F· be enabled in order to work successfully D .  It synchronizes the MAC·， FIB·， and adjacency tables between Active and Standby Route Processor

A .  It supports autonegotiation for both ISL and IEEE 802.1Q trunks. B .  It must be disabled on an interface if you do not want the interface to work as a trunk or start negotiation to become a trunk. C .  It is a point-to-multipoint protocol. D .  It is a point-to-point protocol. E .  It is not supported on private VLAN ports or tunneling ports.

A . RSTP cannot operate with PVST+. B . RSTP defines new port roles. C . RSTP defines no new port states. D . RSTP is a proprietary implementation of IEEE 802.1D STP. E . RSTP is compatible with the original IEEE 802.1D STP.

A . only operational in routed mode B . only operational in transparent mode C . only eight interfaces can belong to an asymmetric routing group D . operational in both failover and non-failover configurations E . only operational when the firewall has been configured for failover

A . 802.1D bridges do not relay BPDUs. B . 802.1w bridges do not relay BPDUs. C . 802.1D bridges only relay BPDUs received from the root. D . 802.1w bridges only relay BPDUs received from the root.

A . EIGRP can be used only as the PE-CE routing protocol if the PE and CE routers are in the same AS B . Other EIGRP AS routes are automatically advertised to the CE router and do not require a redistribution configuration command to be configured C . Unlike other routing protocols that are used between PE and CE routers, EIGRP supports backdoor links D . Configure of the VPN is only required on the PE router

A .  supports multiple protocols B .  works only in a shared or loop environment C .  allows addressing for up to 4 million nodes D .  allows addressing for up to 8 million nodes E .  provides a high speed transport for SCSI payloads F .  may stretch to a distance of up to 100 km before needing extender

A .  Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds. B .  Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds. C .  Distribution switches are single points of failure causing outages for the end devices. D .  Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than onesecond. E .  NSF and SSO with redundant supervisors have the most impact on outages at the accesslayer.

A . PE11 originated label 20. B . PE11 originated label 21. C . ThePE11 upstream neighbor originated label 21. D . The PE11 downstream neighbor originated label 20. E . PE11 will append label 21 to incoming packets labeled 32. F . PE11 will impose label 20 on incoming packets labeled 32.

A . RSTP cannot operate with PVST+. B . RSTP defines new port roles. C . RSTP defines no new port states. D . RSTP is a proprietary implementation of IEEE 802.1D STP. E . RSTP is compatible with the original IEEE 802.1D STP.

A .  only operational in routed mode B .  only operational in transparent mode C .  only eight interfaces can belong to an asymmetric routing group D .  operational in both failover and non-failover configurations E .  only operational when the firewall has been configured for failover

A .

<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/876248999433f0d62dae02333dece382.jpg' /> A. use a Layer 2 link between distribution switches B. use a Layer 3 link between distribution switches C. use a redundant link to the core D. use a Layer 3 link between distribution switches with route summarization