Download Cisco.Realtests.642-885.v26-5.2015-04-08.1e.80q.vcex

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Exam Deploying Cisco Service Provider Advanced Routing (SPADVOUTE)
Number 642-885
File Name Cisco.Realtests.642-885.v26-5.2015-04-08.1e.80q.vcex
Size 4.85 Mb
Posted April 08, 2015
Downloaded 5



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Demo Questions

Question 1
Referring to the topology diagram show in the exhibit, 
 
 
which three statements are correct regarding the BGP routing updates? (Choose three.)

  • A: The EBGP routing updates received by R1 from R5 will be propagated to the R2, R4, and R7 routers
  • B: The EBGP routing updates received by R3 from R6 will be propagated to the R2 and R4 routers 
  • C: The EBGP routing updates received by R1 from R5 will be propagated to the R2 and R4 routers
  • D: The IBGP routing updates received by R3 from R2 will be propagated to the R6 router
  • E: The IBGP routing updates received by R2 from R1 will be propagated to the R3 router
  • F: The IBGP routing updates received by R1 from R4 will be propagated to the R5, R7, and R2 routers



Question 2
When a BGP route reflector receives an IBGP update from a non-client IBGP peer, the route reflector will then forward the IBGP updates to which other router(s)?

  • A: To the other clients only
  • B: To the EBGP peers only
  • C: To the EBGP peers and other clients only
  • D: To the EBGP peers and other clients and non-clients



Question 3
Which two BGP mechanisms are used to prevent routing loops when using a design with redundant route reflectors? (Choose two.)

  • A: Cluster-list
  • B: AS-Path
  • C: Originator ID
  • D: Community 
  • E: Origin



Question 4
Which two statements correctly describe the BGP ttl-security feature? (Choose two.) 
 

  • A: This feature protects the BGP processes from CPU utilization-based attacks from EBGP neighbors which can be multiple hops away
  • B: This feature prevents IBGP sessions with non-directly connected IBGP neighbors
  • C: This feature will cause the EBGP updates from the router to be sent using a TTL of 1
  • D: This feature needs to be configured on each participating BGP router
  • E: This feature is used together with the ebgp-multihop command 



Question 5
When implementing source-based remote-triggered black hole filtering, which two configurations are required on the edge routers that are not the signaling router? (Choose two.)

  • A: A static route to a prefix that is not used in the network with a next hop set to the Null0 interface
  • B: A static route pointing to the IP address of the attacker
  • C: uRPF on all external facing interfaces at the edge routers
  • D: Redistribution into BGP of the static route that points to the IP address of the attacker
  • E: A route policy to set the redistributed static routes with the no-export BGP community



Question 6
Refer to the topology diagram shown in the exhibit and the partial configurations shown below. 
 
 
Once the attack from 209.165.201.144/28 to 209.165.202.128/28 has been detected, which additional configurations are required on the P1 IOS-XR router to implement source-based remote-triggered black hole filtering? 

router bgp 123 
address-family ipv4 unicast 
redistribute static route-policy test 
!

  • A: router static 
    address-family ipv4 unicast 
    209.165.202.128/28 null0 tag 666 
    192.0.2.1/32 null0 tag 667 

    route-policy test 
    if tag is 666 then 
    set next-hop 192.0.2.1 
    endif 
    if tag is 667 then 
    set community (no-export) 
    endif 
    end-policy 
    !
  • B: router static 
    address-family ipv4 unicast 
    209.165.201.144/28 null0 tag 666 
    192.0.2.1/32 null0 tag 667 

    route-policy test 
    if tag is 666 then 
    set next-hop 192.0.2.1 
    endif 
    if tag is 667 then 
    set community (no-export) 
    endif 
    end-policy 
    !
  • C: router static 
    address-family ipv4 unicast 
    209.165.201.144/28 null0 tag 666 
    192.0.2.1/32 null0 

    route-policy test 
    if tag is 666 then 
    set next-hop 192.0.2.1 
    set community (no-export) 
    endif 
    end-policy
  • D: router static 
    address-family ipv4 unicast 
    209.165.202.128/28 null0 tag 666 
    192.0.2.1/32 null0 

    route-policy test 
    if tag is 666 then 
    set next-hop 192.0.2.1 
    set community (no-export) 
    endif 
    end-policy 
    !



Question 7
In Cisco IOS-XR, the maximum-prefix command, to control the number of prefixes that can be installed from a BGP neighbor, is configured under which configuration mode?

  • A: RP/0/RSP0/CPU0:P2(config-bgp)#
  • B: RP/0/RSP0/CPU0:P2(config-bgp-af)#
  • C: RP/0/RSP0/CPU0:P2(config-bgp-nbr)#
  • D: RP/0/RSP0/CPU0:P2(config-bgp-nbr-af)# 



Question 8
In Cisco IOS-XR, the ttl-security command is configured under which configuration mode?

  • A: RP/0/RSP0/CPU0:P2(config)#
  • B: RP/0/RSP0/CPU0:P2(config-bgp)#
  • C: RP/0/RSP0/CPU0:P2(config-bgp-nbr)#
  • D: RP/0/RSP0/CPU0:P2(config-bgp-af)#
  • E: RP/0/RSP0/CPU0:P2(config-bgp-nbr-af)#



Question 9
Refer to the exhibit. 
 
 
Given the partial BGP configuration, which configuration correctly completes the Cisco IOS-XR route reflector configuration where both the 1.1.1.1 and 2.2.2.2 routers are the clients and the 3.3.3.3 router is a non-client IBGP peer? 

  • A: neighbor 1.1.1.1 
    remote-as 65123 
    route-reflector-client 
    neighbor 2.2.2.2 
    remote-as 65123 
    route-reflector-client 
    neighbor 3.3.3.3 
    remote-as 65123
  • B: neighbor 1.1.1.1 
    address-family ipv4 unicast 
    remote-as 65123 
    route-reflector-client 
    neighbor 2.2.2.2 
    address-family ipv4 unicast 
    remote-as 65123 
    route-reflector-client 
    neighbor 3.3.3.3 
    address-family ipv4 unicast 
    remote-as 65123
  • C: neighbor 1.1.1.1 
    remote-as 65123 
    address-family ipv4 unicast 
    route-reflector-client 
    neighbor 2.2.2.2 
    remote-as 65123 
    address-family ipv4 unicast 
    route-reflector-client 
    neighbor 3.3.3.3 
    remote-as 65123
  • D: neighbor 1.1.1.1 remote-as 65123 
    neighbor 1.1.1.1 route-reflector-client 
    neighbor 2.2.2.2 remote-as 65123 
    neighbor 2.2.2.2 route-reflector-client 
    neighbor 3.3.3.3 remote-as 65123



Question 10
Which three methods can be used to reduce the full-mesh IBGP requirement in a service provider core network? (Choose three.)

  • A: Implement route reflectors
  • B: Enable multi-protocol BGP sessions between all the PE routers
  • C: Implement confederations
  • D: Implement MPLS (LDP) in the core network on all the PE and P routers
  • E: Enable BGP synchronization
  • F: Disable the IBGP split-horizon rule 









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