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多选题
Unicast Reverse Path Forwarding （Urpf ） can work in the following modes：（）
A
Express mode
B
Strict mode
C
Loose mode
D
Tunnel mode
E
Safe mode
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Which configuration command allows the ERX Edge Router to perform Unicast Reverse Path Forwarding lookups on all packets received on an IP interface?()
A. ip sa-validateB. ip split-horizonC. ip access-routesD. ip filter-options
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What is one of the uses of MBGP routes?()
A. DVMRP hold-time periodB. Rendezvous point electionC. reverse path forwarding checksD. interdomain multicast next hops
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What is the purpose of unicast reverse path forwarding?()
A. to validate packet receipt on interfaces where the traffic should be receivedB. to forward packets out the interfaces where the traffic should be receivedC. to forward packets out the interfaces where the traffic should be sentD. to validate packet receipt on interfaces where the traffic should be sent
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Refer to the exhibit. Which two conclusions can be drawn from the debug ip igmp output?()
A. The router sent an IGMP version 2 query out interface Ethernet1 at multicast address 224.0.0.1.B. Router RTA received an IGMP report version 1 from host 192.168.9.1.C. Reverse Path Forwarding (RPF) is ena bled for 192.168.9.4.D. Reverse Path Forwarding (RPF) is enabled for 224.0.1.40.E. The IP multicast groups are 224.0.0.1, 224.0.1.40, and 239.255.0.1.F. IP PIM RP mapping is static.
考题
Which of the following is the most effective technique to prevent source IPAddress spoofing？（）A、 policy based routing （PBR）B、 unicast reverse path forwarding （uRPF）C、 lock and keyACLD、 RFC 1918filteringE、 IP source routing
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Unicast Reverse Path Forwarding （Urpf ） can work in the following modes：（）A、Express modeB、Strict modeC、Loose modeD、Tunnel modeE、Safe mode
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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
Which of these statements accurately identifies how Unicast Reverse Path Forwarding can be employed to prevent the use of malformed or forged IP sources addresses？（）A、It is applied only on the input interface of a router.B、It is applied only on the output interface of a router.C、It can be configured either on the input or output interface of a router.D、It cannot be configured on a router interface.E、It is configured under any routing protocol process.
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.
考题
What Cisco technology protects against Spanning-Tree Protocol manipulation？（）A、 Spanning tree protectB、 Root Guard and BPDU GuardC、 Unicast Reverse Path ForwardingD、 MAC spoof guardE、 Port Security
考题
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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The OSPF RFC 3623 Graceful Restart feature allows you to configure IETF NSF in ultivendor networks. When using OSPF Graceful Restart，which mechanism is used tocontinue forwarding packets during a switchover？（）A、Reverse Path ForwardingB、Hardware-based forwardingC、UDP forwardingD、Layer 2 Forwarding
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Which of the following IOS features can prevent IP spoofing attacks？（）A、PPP over EthernetB、Cisco Express forwardingC、MPLS traffic EngineeringD、IS-IS routingE、Unicast Reverse Path Forwarding（uRPF）
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Unicast Reverse Path Forwarding can perform all of these actions except which one？（）A、examine all packets received to make sure that the source addresses and source interfaces appear in the routing table and match the interfaces where the packets were receivedB、check to see if any packet received at a router interface arrives on the best return pathC、combine with a configured ACLD、log its events，if you specify the logging options for the ACL entries used by the unicast rpf commandE、inspect IP packets encapsulated in tunnels， such as GRE
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在组播网络中RPF代表什么？（）。A、Reverse protocol forwardingB、Reverse protocol floodingC、Reverse path forwardingD、Reverse path flooding
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What is the purpose of unicast reverse path forwarding?（）A、to validate packet receipt on interfaces where the traffic should be receivedB、to forward packets out the interfaces where the traffic should be receivedC、to forward packets out the interfaces where the traffic should be sentD、to validate packet receipt on interfaces where the traffic should be sent
考题
What is one of the uses of MBGP routes?（）A、DVMRP hold-time periodB、Rendezvous point electionC、reverse path forwarding checksD、interdomain multicast next hops
考题
单选题Which of the following is the most effective technique to prevent source IPAddress spoofing？（）A
policy based routing （PBR）B
unicast reverse path forwarding （uRPF）C
lock and keyACLD
RFC 1918filteringE
IP source routing
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What is the term "ordered control" mean regarding how MPLS LSPs are established?（）A
establish starting at the egress router going back to the ingress routerB
establish starting at the ingress router going downstream to the egress routerC
establish when a router learns of a new prefixD
establish when the path correctly matches the reverse path forwarding check
考题
单选题Which configuration command allows the ERX Edge Router to perform Unicast Reverse Path Forwarding lookups on all packets received on an IP interface?（）A
ip sa-validateB
ip split-horizonC
ip access-routesD
ip filter-options
考题
单选题Which of the following IOS features can prevent IP spoofing attacks？（）A
PPP over EthernetB
Cisco Express forwardingC
MPLS traffic EngineeringD
IS-IS routingE
Unicast Reverse Path Forwarding（uRPF）
考题
单选题Which of these statements accurately identifies how Unicast Reverse Path Forwarding can be employed to prevent the use of malformed or forged IP sources addresses？（）A
It is applied only on the input interface of a router.B
It is applied only on the output interface of a router.C
It can be configured either on the input or output interface of a router.D
It cannot be configured on a router interface.E
It is configured under any routing protocol process.
考题
单选题What Cisco technology protects against Spanning-Tree Protocol manipulation？（）A
Spanning tree protectB
Root Guard and BPDU GuardC
Unicast Reverse Path ForwardingD
MAC spoof guardE
Port Security
考题
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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