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| Section | Objectives |
|---|---|
| Topic 1: WAN and Edge Connectivity Design | - Traditional WAN and internet edge design - SD-WAN architecture and design considerations |
| Topic 2: Enterprise Network Design Principles | - Design methodologies and best practices - Scalability and high availability design |
| Topic 3: Network Services Design | - Routing protocols design (OSPF, EIGRP, BGP) - Multicast and QoS design considerations |
| Topic 4: Enterprise Campus Network Design | - Campus LAN architecture - Spine-leaf and hierarchical design models |
| Topic 5: Network Automation and Programmability | - Controller-based networking design - API-driven network automation concepts |
| Topic 6: Security Design in Enterprise Networks | - Segmentation and access control design - VPN and perimeter security architecture |
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NEW QUESTION # 402
An engineer must peer with an ISP for internet connectivity using BGP, initially, the engineer wants to receive only specific prefixes from the ISP and a default route. However, the solution must provide the flexibility to add prefixes in the future at short notice. The ISP has a two-week change process in place. Which route filtering solution must the engineer employ?
Answer: C
Explanation:
anychange on the prefix list, engineer only need to update the preifx list and restart the BGP peer to the ISP. soft-reconfiguration inbound could be used to reduce down time of reset BGP peer, but it require lots of memory and in this case, connection to ISP and tons of route learnt will not be apporitated.
NEW QUESTION # 403 
Refer to the exhibit. A network architect is preparing a network design based on EIGRP. Routers are connected using a Cat6a cable type and the inter-router connection speed is limited to 10 Mbps due to distance. During the pilot phase, a DUAL-3-SIA error message is visible. Which action must the engineer take to create a stable design?
Answer: B
Explanation:
The correct action is to configure EIGRP stub behavior on R4. The DUAL-3-SIA message indicates a Stuck- in-Active condition, which occurs when EIGRP sends a query and does not receive a reply within the expected time. Cisco explains that EIGRP stub routing is used to improve stability and reduce resource usage by preventing unnecessary queries from being sent to remote or edge routers. In the described topology, R4 is connected over a limited 10 Mbps inter-router link and should not be treated as a transit router for the rest of the routing domain. Making R4 an EIGRP stub limits the query scope and reduces the chance of active routes waiting on a slow or constrained neighbor. Poison reverse and split-horizon changes address loop prevention and hub-and-spoke update behavior, but they do not directly solve the SIA instability. A summary on R2 may help scaling but does not identify the edge-router query boundary as precisely as EIGRP stub. Reference topics: EIGRP DUAL, Stuck-in-Active, EIGRP stub routing, query scoping, WAN edge stability.
NEW QUESTION # 404
Prior to establishing full-mesh iPsec tunnels in a typical Cisco SD-WAN deployment, which mechanism do WAN Edge routers use to exchange Key information for data plane encryption?
Answer: A
NEW QUESTION # 405
Refer to the exhibit. A customer is currently running DMVPN and advertising a default route from the hub to the spokes. The customer wants to reduce the amount of traffic passing through the hub by having the spokes communicate directly using dynamic tunnels; however, the customer wants to continue advertising the default route. Which solution must the customer select?
Answer: D
Explanation:
DMVPN Phase 3 with NHRP redirects allows spokes to dynamically establish direct tunnels with each other for spoke-to-spoke communication, while the hub continues to advertise the default route, minimizing unnecessary traffic through the hub.
NEW QUESTION # 406
Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 become a transit AS. Which filtering solution must the architect choose?
Answer: D
NEW QUESTION # 407
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