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Cisco 300-420 exam is designed to test the knowledge and skills of IT professionals in designing enterprise networks that are scalable, reliable, and secure. Passing 300-420 exam demonstrates that a candidate has a deep understanding of Cisco technologies and can design complex enterprise networks that meet the needs of modern businesses. Earning the CCDP certification can open up new career opportunities for IT professionals and provide them with the knowledge and skills needed to design and implement advanced enterprise networks.

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Cisco 300-420 Certification Exam is an essential exam for IT professionals seeking to advance their careers in network design. It is a rigorous exam that tests the candidate's proficiency in network design principles, enterprise campus architecture, WAN technologies, security, and automation. By passing the exam, candidates can demonstrate their expertise in designing and implementing robust, scalable, and secure enterprise networks using Cisco technologies.

Cisco Designing Cisco Enterprise Networks Sample Questions (Q66-Q71):

NEW QUESTION # 66
Which two BGP features will result in successful route exchanges between eBGP neighbors sharing the same AS number? (Choose two.)

Answer: A,C

Explanation:
When eBGP neighbors share the same autonomous system number, normal BGP loop-prevention behavior can block route acceptance because the receiving router sees its own AS in the AS_PATH. Two BGP features address this design condition. The allow-as-in feature permits a BGP router to accept routes even when its own AS appears in the AS_PATH a configured number of times. This is often used in dual-homed or migration designs where the same customer AS appears at multiple sites. The as-override feature is typically used by a provider edge router to replace the customer AS in the AS_PATH with the provider AS before advertising the route to another customer site that uses the same AS. Together, these features allow successful route exchange in same-AS eBGP scenarios while preserving loop-prevention intent through controlled policy. Advertise-best-external influences advertisement of best external paths and does not solve same-AS rejection. Bestpath as-path ignore affects path selection, not route acceptance. Client-to-client reflection is an iBGP route-reflector behavior, not an eBGP same-AS solution.


NEW QUESTION # 67
A company's security policy requires that all connections between sites be encrypted in a manner that does not require maintenance of permanent tunnels. The sites are connected through a private MPLS-based service that uses a dynamically changing key and spoke-to-spoke communication. Which type of transport encryption must be used in this environment?

Answer: D


NEW QUESTION # 68
An engineer must design a QoS solution for a customer that is connected to an ISP over a 1Gbps link with a 100Mbps CIR. The ISP aggressively drops all traffic received over which is causing numerous TCP retransmissions. The customer is not using any RTP applications but wants to maximize bandwidth usage up to the CIR. Which QoS solution engineer choose?

Answer: A

Explanation:
https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645-policevsshape.html


NEW QUESTION # 69
Refer to the exhibits. An engineer is troubleshooting an issue in which the Gig0/2 interface on a Cisco switch named SW2 fails to become the root port. Which two commands must be run on SW2 to resolve this issue? (Choose two.)

Answer: B,D


NEW QUESTION # 70
An engineer must configure EIGRP to ensure that all WAN routes are not advertised to the routers in a data center. Which action must be taken?

Answer: B

Explanation:
The action is to configure the EIGRP stub router in receive-only mode. Cisco EIGRP stub routing limits which routes a router advertises to neighbors, reducing query scope and improving stability in hub-and-spoke or WAN designs. The receive-only keyword is the most restrictive stub option: the router receives routes from neighbors but does not advertise any routes to them. That directly satisfies the requirement that WAN routes must not be advertised to the routers in the data center. Advertising only a default route still advertises routing information, so it does not meet the wording. Summarizing local subnets reduces the number of routes, but it still advertises reachability. The "distributed mode" option is not the correct EIGRP stub behavior for this requirement; redistributed stub mode would allow redistributed routes to be advertised. Receive-only is therefore the precise design control for stopping route advertisement from the stub router. Reference topics:
EIGRP stub routing, receive-only mode, query scoping, route advertisement control, WAN-to-data-center design.


NEW QUESTION # 71
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