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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Services | 10% | - Design end-to-end QoS policy - Design network management |
| Topic 2: WAN for Enterprise Networks | 20% | - Design SD-WAN solution - Design QoS for WAN - Design WAN connectivity |
| Topic 3: Advanced Addressing and Routing Solutions | 25% | - Create structured addressing designs - Create stable, secure, and scalable routing designs for Layer 3 - Determine IPv6 migration strategy |
| Topic 4: Enterprise Campus Security | 20% | - Design network access control - Design network security |
| Topic 5: Advanced Enterprise Campus Networks | 25% | - Design for high availability - Design Layer 2 and Layer 3 campus networks - Design campus network services (QoS, multicast, etc.) |
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NEW QUESTION # 432 
Refer to the exhibit. An architect must design an OSPF solution for an enterprise customer. The design must meet these requirements:
Limit the link flap impact to Area-1 and Area-2.
Any link failure must have minimal impact on voice and video traffic.
Which two OSPF solutions must the architect include in the design? (Choose two.)
Answer: B,C
Explanation:
The OSPF design should include LSA/SPF timer tuning and summarization with appropriate stub-area design.
Cisco OSPF convergence is affected by failure detection, LSA generation, flooding, SPF scheduling, and routing-table installation. Tuning LSA and SPF throttling timers helps the network react quickly to genuine failures while avoiding excessive CPU churn during repeated flaps. This is especially important when voice and video traffic are sensitive to convergence delay. Manual route summarization at area boundaries reduces the number of detailed routes advertised between areas and limits the blast radius of link failures. Configuring nonbackbone areas as stub networks where appropriate also reduces external LSA propagation and lowers router resource use. Reducing DR and BDR election frequency is not a primary design tool for convergence, and increasing hello and hold timers would slow failure detection rather than improve it. Advertising default routes can be useful, but it does not by itself contain link flap impact. Reference topics: OSPF area design, LSA throttling, SPF throttling, route summarization, stub areas, convergence optimization.
NEW QUESTION # 433
Which NETCONF operation creates filtering that is specific to the session notifications?
Answer: B
NEW QUESTION # 434
Refer to the exhibit.
Refer to the exhibit. The connection between SW2 and SW3 is fiber and occasionally experiences unidirectional link failure. An architect must optimize the network to reduce the change of layer2 forwarding loops when the link fails. Which solution should the architect include?
Answer: A
NEW QUESTION # 435
Which feature is required for graceful restart to recover from a processor failure?
Answer: B
Explanation:
Graceful restart and nonstop forwarding designs depend on preserving forwarding continuity during a control- plane processor switchover. Cisco Stateful Switchover provides the mechanism for a standby route processor or supervisor to maintain synchronized state so it can assume control when the active processor fails. When SSO is combined with NSF or graceful restart capabilities in routing protocols, neighboring devices can continue forwarding traffic while the restarting device preserves or rebuilds control-plane adjacencies. Cisco Express Forwarding is required for fast data-plane forwarding, but CEF alone does not provide route processor state synchronization after processor failure. Virtual Switch System is a chassis or switching architecture that can provide high availability in certain campus designs, but it is not the required feature named by graceful restart recovery. Bidirectional Forwarding Detection is a failure-detection protocol used to detect path or neighbor failures quickly; it does not recover a failed processor. Therefore, the feature that must be incorporated for graceful restart recovery from processor failure is Stateful Switchover. In a resilient enterprise design, SSO, NSF, and protocol graceful restart are coordinated to reduce outage impact.
NEW QUESTION # 436 
Refer to the exhibit. An architect must ensure a convergence time of 200 ms or less during a link failure within area 0. In addition, the solution must not impact the overall performance of the network. Which solution must the architect select?
Answer: C
Explanation:
BFD is the correct design feature for detecting a link failure within 200 ms or less without materially increasing OSPF control-plane load. Cisco uses Bidirectional Forwarding Detection as a fast, lightweight failure-detection protocol that can be associated with routing protocols such as OSPF. Instead of relying on aggressive OSPF hello and dead timers, BFD performs rapid forwarding-path checks and notifies OSPF when the path fails. This allows fast convergence while avoiding the additional routing-protocol overhead and instability that can come from very low hello timers. UDLD detects unidirectional Layer 2 fiber failures, but it is not the routing adjacency failure-detection mechanism requested here. Carrier delay can adjust interface state transition timing, but it does not provide a routing-protocol independent liveness session. Fast hellos can reduce detection time, but they increase protocol traffic and can affect overall performance. BFD is therefore the proper design choice for fast and efficient OSPF convergence. Reference topics: BFD, OSPF convergence, fast failure detection, routed campus resiliency, control-plane efficiency.
NEW QUESTION # 437
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