2026 Actual Cisco 400-007 Dumps, Updated Exam Questions for Guaranteed Pass

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Cisco 400-007 practice quiz with correct answers for search indexing.

1. Question 1

   Company XYZ is running OSPF in their network. They have merged with another company that is running EIGRP as the routing protocol. Company XYZ now needs the two domains to talk to each other with redundancy, while maintaining a loop-free environment. The solution must scale when new networks are added into the network in the near future. Which technology can be used to meet these requirements?

   Amultipoint route-redistribution with route filtering using ACLs
   

   BDUMP multipoint route-redistribution with route filtering using route tags
   

   CDUMPS single point route-redistribution with route filtering using route tags
   

   DDUMPS single point route-redistribution with route filtering using ACLs
   

   Correct answer: C

   DUMPS (Designated Unified Multiprotocol Redistribution Strategy) using single-point redistribution with route tagging ensures scalable, loop-free redistribution.

   Route tags prevent redistributed routes from being re-advertised into the originating protocol, avoiding routing loops even with multiple paths.

   Single-point redistribution simplifies operational complexity compared to multipoint redistribution.

   Why other options are incorrect:

   A, B, D: ACLs are not scalable for filtering redistributed routes in large networks. Tags provide better control.

   
   

2. Question 2

   Refer to the exhibit: A customer is migrating from a TDM-based Layer 2 VPN (L2VPN) to an MPLS Layer 3 VPN (L3VPN) in phases. The backbone OSPF connection between HUB A and HUB B will be replaced by eBGP. During the migration, some spokes (A2 and B1) are already moved to the L3VPN. The goal is to avoid routing loops during this hybrid transition.

   Which design choice helps prevent routing loops during the backbone link migration?

   AEnable route filtering on OSPF backbone routers for spoke traffic
   

   BAdvertise low AD value for transit traffic on hub sites
   

   COSPF backbone area advertises summarized routes to hub
   

   DRedistribute EIGRP 200 and 300 with low cost into BGP
   

   Correct answer: A

   Comprehensive

   A: In hybrid WAN designs where routing domains are gradually migrating from OSPF to BGP, particularly with overlapping domains or redistribution points, loops can occur if the same routes are seen via multiple protocols (e.g., BGP and OSPF). Implementing route filtering on the OSPF backbone prevents it from learning and advertising spoke routes that it also receives via BGP---eliminating the loop scenario.

   B: Advertising a low administrative distance (AD) for transit traffic does not prevent loops and may worsen convergence or cause routing inconsistency.

   C: Summarizing OSPF routes may reduce the routing table size, but it does not solve the loop issue caused by dual protocol redistribution unless filtering is applied.

   D: Redistributing EIGRP routes into BGP with a low cost might cause preference toward one path but does not address the loop risk between the hybrid segments (OSPF and BGP).

   This is a classic use case for route filtering in dual-protocol or dual-backbone migrations, where ensuring consistent path selection and loop prevention is essential.

   
   

3. Question 3

   You are designing the routing design for two merging companies that have overlapping IP address space. Which of these must you consider when developing the routing and NAT design?

   ALocal to global NAT translation is done after routing
   

   BGlobal to local NAT translation is done before routing
   

   CLocal to global NAT translation is done before policy-based routing
   

   DGlobal to local NAT translation is done after policy-based routing
   

   Correct answer: C

   In most Cisco NAT implementations:

   Local-to-global NAT translations occur before policy-based routing (PBR), meaning that NAT happens first, and then PBR decisions are made based on the translated addresses.

   This sequence is important when designing overlapping address spaces, as NAT must be applied before routing policies can correctly forward traffic based on global addresses.

   Other options explained:

   A: Incorrect sequence.

   B/D: Global-to-local translations occur during inbound processing but not in the order described relative to PBR.

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4. Question 4

   Which two network design considerations improve the maximum link utilization? (Choose two)

   Acentralizing the decision-making process
   

   Bchannelizing the traffic at the receivers
   

   Cdecentralizing the classes of traffic
   

   Dprogrammatically rate-limiting traffic at the senders
   

   Edifferentiating the path calculation
   

   Correct answer: C, E

   
   

5. Question 5

   Which two factors provide multifactor authentication for secure access to applications and data? (Choose two.)

   APersona-based
   

   BPower-based
   

   CPush-based
   

   DPossession-based
   

   EPull-based
   

   Correct answer: C, D

   C (Push-based):Push notifications to a registered device (typically a phone) are used as a second authentication factor.

   D (Possession-based):Possession factor includes physical tokens, smart cards, or registered devices --- verifying that the user possesses something unique.

   Other options explained:

   A/B/E: Not valid MFA factors under standard authentication frameworks.

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