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Cisco 300-420 certification exam is a comprehensive test that covers a broad range of topics related to designing enterprise networks. 300-420 exam focuses on network design principles and concepts, including advanced addressing and routing solutions, advanced enterprise campus networks, WAN, security, and network services. 300-420 Exam also tests the candidate's knowledge of network virtualization technologies, network automation, and network programmability.

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Cisco Designing Cisco Enterprise Networks Sample Questions (Q437-Q442):

NEW QUESTION # 437
An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from sources in another AS. Which feature must the design include?

A. SSM
B. Anycast RP
C. Bidirectional PIM
D. MSDP

Answer: B

Explanation:
Explanation
https://learningnetwork.cisco.com/s/question/0D53i00000KsrGrCAJ/rendezvous-point-high-availability-mechan

NEW QUESTION # 438
Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?

A. PIM SSM must run in the underlay.
B. Multicast clients reside in the underlay, and the multicast source is outside the fabric or in the overlay.
C. Multicast traffic is transported in the overlay and the EID space for wired and wireless clients.
D. Rendezvous points must be used in a PIM SSM deployment.

Answer: C

Explanation:
When multicast is included in a Cisco SD-Access architecture, the architect must account for multicast transport in the overlay for endpoint traffic. Cisco SD-Access separates the underlay, which provides IP connectivity between fabric nodes, from the overlay, which carries user endpoint traffic in the endpoint identifier space. For wired and wireless clients, multicast traffic is transported as part of the overlay service rather than treating clients as underlay participants. That is why the correct design element is that multicast traffic is transported in the overlay and EID space for both wired and wireless clients. PIM SSM does not have to run in the underlay for this purpose, and multicast clients do not simply reside in the underlay. The statement about RPs being required in an SSM deployment is also wrong because source-specific multicast is specifically designed to avoid the traditional RP model. In a fabric design, multicast requirements affect border behavior, receiver placement, replication mode, wireless integration, and policy boundaries. Reference topics: Cisco SD-Access multicast, overlay forwarding, EID space, wired and wireless fabric clients.

NEW QUESTION # 439
Refer to the exhibit.

The failover time of ISP-2 is significantly shorter than ISP-1 when an interface on the ISP router toward the campus network fails. Which solution minimizes the downtime to the sub-second?

A. BFD
B. Next-hop address tracking
C. Graceful-restart
D. Aggressive timers

Answer: A

Explanation:
https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbbnhop.html

NEW QUESTION # 440
The customer solution requires QoS to support streaming multimedia over a WAN. An architect chooses to use Per-Hop Behavior. Which solution should the engineer use to of mark traffic traveling between branch sites?

A. CBWFQ with DSCP AF2
B. LLQ with DSCP EF
C. LLQ with DSCP AF4
D. CBWFQ with DSCP AF3

Answer: D

NEW QUESTION # 441
Refer to the exhibit. Where must an architect plan for route summarization for the topology?

A. from the core toward the aggregation and the aggregation toward the core
B. from the aggregation toward the access and the access toward the aggregation
C. from the aggregation toward the core and the aggregation toward the access

Answer: C

NEW QUESTION # 442
......

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