400-007 practice questions 31–40

1. Question 31 · 263 in bank

   Select 2

   What are two common approaches to analyzing and designing networks? (Choose two.)

   • Athree-tier approach
   • Btop-down approach
   • Chigh-low security approach
   • Dbottom-up approach
   • Eleft-right approach

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   Answer: BD

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2. Question 32 · 263 in bank

   

   Refer to the exhibit. OSPF is running as the IGP to provide reachability to all AS100 networks. R3 and R4 are the current ABRs at the boundary of OSPF Area0 and Area1. Now BGP must be deployed within AS100 because it will be receiving Internet routes from its eBGP peers (the service provider) connected to R1 and R2. What is an optimal solution for this deployment to configure BGP relationships and redistribute BGP learned routes into OSPF?

   • AR5 should be configured as a route reflector for R1, R2, R3 and R4. BGP routes must be redistributed at R1 and R2 into OSPF.
   • BConfederation should be set up with R1, R5, and R3 in one sub AS, with R2 and R4 in another, and redistribution at R1 and R2.
   • CR1, R2, R3 and R4 must be set up with a neighbor relationship with R5 only. R5 must not be a route reflector.
   • DA full mesh should be deployed between all the routers with mutual redistribution to take place at R1 and R2.

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   Answer: A

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3. Question 33 · 263 in bank

   Select 2

   A multicast network is using Bidirectional PIM. Which two combined actions achieve high availability so that two RPs within the same network can act in a redundant manner? (Choose two.)

   • AAdvertise the two RP addresses in the routing protocol.
   • BUse two phantom RP addresses.
   • CManipulate the multicast routing table by creating static mroutes to the two RPs.
   • DControl routing to the two RPs through a longest match prefix.
   • EUse Anycast RP based on MSDP peering between the two RPs.
   • FManipulate the administrative distance of the unicast routes to the two RPs.

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   Answer: BD

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4. Question 34 · 263 in bank

   

   Refer to the exhibit. Which impact of using three or more ABRs between the backbone area and area 1 is true?

   • AIn a large-scale network, multiple ABRs can create microloops.
   • BMultiple ABRs reduce the CPU processing on each ABR due to splitting prefix advertisement between areas.
   • CPrefixes from the non-backbone area are advertised by one ABR to the backbone area.
   • DIn a large-scale network, LSA replication, by all ABRs, can cause serious scalability issues.

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   Answer: D

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5. Question 35 · 263 in bank

   Company XYZ runs OSPF in their network. A design engineer decides to implement hot-potato routing architecture. How can this implementation be achieved?

   • AEnable iBGP and apply prepend to ensure all prefixes will have the same length of the AS path attribute value.
   • BRedistribute the external prefixes onto OSPF and ensure that the total metric calculation includes external and internal values.
   • CEnable OSPF load-balancing over unequal cost path.
   • DRedistribute the external prefixes onto OSPF and ensure the total metric calculation includes only the external value and the value is the same in all ASBRs.

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   Answer: D

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6. Question 36 · 263 in bank

   How many fully established neighbour relationships exist on an Ethernet with five routers running OSPF as network type broadcast?

   • A5
   • B6
   • C7
   • D10
   • E20

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   Answer: C

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7. Question 37 · 263 in bank

   How can EIGRP topologies be designed to converge as fast as possible in the event of a point-to-point link failure?

   • ALimit the query domain by use of summarization.
   • BLimit the query domain by use of default routes.
   • CBuild neighbor adjacencies in a squared fashion.
   • DLimit the query domain by use of distribute lists.
   • EBuild neighbor adjacencies in a triangulated fashion.

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   Answer: A

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8. Question 38 · 263 in bank

   Company XYZ, a global content provider, owns data centers on different continents. Their data center design involves a standard three-layer design with a Layer 3-only core. HSRP is used as the FHRP. They require VLAN extension across access switches in all data centers, and they plan to purchase a Layer 2 interconnection between two of their data centers in Europe. In the absence of other business or technical constraints, which termination point is optimal for the Layer 2 interconnection?

   • Aat the core layer, to offer the possibility to isolate STP domains
   • Bat the aggregation layer because it is the Layer 2 to Layer 3 demarcation point
   • Cat the access layer because the STP root bridge does not need to align with the HSRP active node
   • Dat the core layer because all external connections must terminate there for security reasons

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   Answer: B

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9. Question 39 · 263 in bank

   

   Refer to the exhibit. An engineer is designing the network for a multihomed customer running in AS 111 AS 111 does not have any other ASs connected to it. Which technology is more comprehensive to use in the design to make sure that the AS is not being used as a transit AS?

   • AInclude an AS path access list to send routes to the neighboring ASs that only have AS 111 in the AS path field.
   • BConfigure the AS-set attribute to allow only routes from AS 111 to be propagated to the neighbor ASs.
   • CUse the local preference attribute to configure your AS as a "non-transit" AS.
   • DInclude a prefix list to only receive routes from neighboring ASs.

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   Answer: A

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10. Question 40 · 263 in bank

    Which interconnectivity method offers the fastest convergence in the event of a unidirectional issue between three Layer 3 switches connected together with routed links in the same rack in a data center?

    • AFiber Ethernet connectivity with UDLD enabled
    • BCopper Ethernet connectivity with UDLD enabled
    • CFiber Ethernet connectivity with BFD enabled
    • DCopper Ethernet connectivity with BFD enabled

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    Answer: C

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400-007 practice, question 31. 263 questions available.