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单选题
What is true about Unicast RPF in strict mode？（）
A
It works well with a multihomed environment.
B
It will inspect IP packets that are encapsulated in tunnels， such as GRE，LT2P，or PPTP.
C
uRPF is performed within the CEF switching path.
D
There might be a problem with DHCP as Unicast RPF is blocking packets with a 0.0.0.0 sourceaddress.
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更多 “单选题What is true about Unicast RPF in strict mode？（）A It works well with a multihomed environment.B It will inspect IP packets that are encapsulated in tunnels， such as GRE，LT2P，or PPTP.C uRPF is performed within the CEF switching path.D There might be a problem with DHCP as Unicast RPF is blocking packets with a 0.0.0.0 sourceaddress.” 相关考题
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Which mechanism does External BGP use to prevent the formation of routing loops?()
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Which two multicast protocol statements are true?()
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Which statement about vlan operation on cisco catalyst switches is true?()
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Which two statements are true about Unicast Reverse Path Forwarding Loose Mode？（）A、It is used in multihome network scenarios.B、It can be used with BGP to mitigate DoS and DDoS.C、It does not need to have CEF enabled.D、It is enabled via the interface level command ip verify unicast reverse-path.E、It cannot be used with "classification" access lists.
考题
What is true about Unicast RPF in strict mode？（）A、It works well with a multihomed environment.B、It will inspect IP packets that are encapsulated in tunnels， such as GRE，LT2P，or PPTP.C、uRPF is performed within the CEF switching path.D、There might be a problem with DHCP as Unicast RPF is blocking packets with a 0.0.0.0 sourceaddress.
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What Cisco IOS feature examines packets received to make sure that the source address and interfaceare in the routing table and matck the interface that the packet was received on？（）A、MPLS Traffic EngineeringB、Dynamic access-listsC、AuthenticationD、Receive ACLE、Unicast RPF
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Which statement about vlan operation on cisco catalyst switches is true?（）A、when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table.B、unkown unicast frames are retransmitted only to the ports that belong to the same vlanC、ports between switches should be configured in access mode so that vlans can span across the portsD、broadcast and multicast frames are retransmitted to ports that are configured on different vlan.
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For a router connected to two ISPs for redundancy， using IPSLA and static routing， how would you configure uRPF on the uplink interface？（）A、ip verify unicast source reachable-via anyB、ip verify unicast reverse-pathC、ip verify unicast reverse-path looseD、ip verify unicast reverse-path strict
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Which two statements about RPF checks in Multicast Source Discovery Protocol （MSDP） are true？（）A、It prevents message looping， Session Advertisement （SA）messages must be RPF checkedB、RPF check should be done against the route to the source S of the corresponding PIM-SM domainC、RPF check should be done against the route to the Rendez-vous Point of the corresponding PIM-SM domain，which originated the SAD、RPF checking Session Advertisement （SA） messages will cause message looping
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Which statement about PIM sparse mode operations is true？（）A、It does not support all underlying unicast routing protocols like BGPB、Receivers are registered with RP by their first hop routerC、From the RP， traffic flows down a source tree to each receiver.D、It supports shared trees only， and assumes all hosts want the multicast trafficE、Receivers are joined to the shared tree by their local designated router
考题
单选题For a router connected to two ISPs for redundancy， using IPSLA and static routing， how would youconfigure uRPF on the uplink interface？（）A
ip verify unicast source reachable-via anyB
ip verify unicast reverse-pathC
ip verify unicast reverse-path looseD
ip verify unicast reverse-path strict
考题
单选题Which statement about PIM sparse mode operations is true？（）A
It does not support all underlying unicast routing protocols like BGPB
Receivers are registered with RP by their first hop routerC
From the RP， traffic flows down a source tree to each receiver.D
It supports shared trees only， and assumes all hosts want the multicast trafficE
Receivers are joined to the shared tree by their local designated router
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多选题Which two multicast protocol statements are true?（）ASparse mode multicast uses a pull model to send multicast traffic to where it is requestedBDense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted trafficCDense mode multicast requires explicit join messa ges from their membersDSparse mode uses reverse path forwarding (RPF) to prune off redundant flowsEThe primary use of sparse mode multicast is for test labs and router performance testing
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多选题Which two statements are true about Unicast Reverse Path Forwarding Loose Mode？（）AIt is used in multihome network scenarios.BIt can be used with BGP to mitigate DoS and DDoS.CIt does not need to have CEF enabled.DIt is enabled via the interface level command ip verify unicast reverse-path.EIt cannot be used with classification access lists.
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AB
BC
CD
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