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The Cisco 300-420 ENSLD is a certification exam that verifies your understanding of enterprise designing, including advanced enterprise campus networks, advanced routing and addressing solutions, WAN, SDA, network services, and security services. This test is associated with two certificates, which are the Cisco Certified Specialist – Enterprise Design and the CCNP Enterprise. In this article, we will talk about this exam in more detail.

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After successful competition of the Cisco 300-420 certification, the certified candidates can put their career on the right track and achieve their professional career objectives in a short time period. For the recognition of skills and knowledge, more career opportunities, professional development, and higher salary potential, the Cisco 300-420 Certification Exam is the proven way to achieve these tasks quickly.

Cisco Designing Cisco Enterprise Networks Sample Questions (Q399-Q404):

NEW QUESTION # 399
An engineer is designing an EIGRP network for a small branch site where there is only one Layer 3 router.
The engineer wants the router to advertise the local LAN network to remote EIGRP neighbors without sending any unnecessary multicast messages on the local LAN. Which action should the engineer take?

Answer: C

Explanation:
The branch router should advertise the local LAN with the EIGRP network command and make the LAN- facing interface passive. A passive interface allows the connected network to be included in EIGRP advertisements while suppressing EIGRP hello packets and neighbor formation on that interface. This is exactly what the engineer needs: remote EIGRP neighbors learn the LAN subnet, but unnecessary multicast EIGRP messages are not sent onto the user LAN where no EIGRP neighbors should exist. Replacing EIGRP with a static default route would not meet the requirement to advertise the local LAN through EIGRP.
Redistributing connected routes can work, but it is less clean for a simple LAN interface and can introduce external-route behavior or policy complexity. Advertising the subnet as a stub network does not suppress multicast hellos on the LAN interface by itself. Cisco design best practice is to use passive interfaces on LAN- facing interfaces that should be advertised but should not form routing adjacencies. Reference topics: EIGRP passive interface, network statements, branch routing, unnecessary neighbor prevention, multicast control traffic.


NEW QUESTION # 400
A customer's current Layer 2 infrastructure is running Spanning Tree 802.1d, and all configuration changes are manually implemented on each switch. An architect must redesign the Layer 2 domain to achieve these goals:
* reduce the impact of topology changes
* reduce the time spent on network administration
* reduce manual configuration errors
Which two solutions should the architect include in the new design? (Choose two.)

Answer: B,E


NEW QUESTION # 401
Which two steps can be taken to improve convergence in an OSPF network? (Choose two.)

Answer: C,D

Explanation:
The two practical OSPF convergence improvements are enabling Bidirectional Forwarding Detection and tuning OSPF timers and throttling behavior. Cisco describes BFD as a protocol designed to provide fast forwarding-path failure detection across media, encapsulations, topologies, and routing protocols. With OSPF, BFD allows a neighbor failure to be detected rapidly without depending only on the OSPF dead interval.
OSPF parameters can also be tuned, including SPF scheduling, LSA generation, and LSA arrival throttling, so the control plane reacts quickly but not recklessly during instability. Merging all areas into one backbone area is not a convergence improvement; it usually increases the size of the link-state database and the impact of topology changes. Making every nonbackbone area stub may reduce external LSA scope, but it is not universally valid and does not directly solve failure detection. Spanning the same IP network across multiple OSPF areas is a poor design and can create operational ambiguity. Therefore, BFD plus careful OSPF parameter tuning are the appropriate convergence-focused design actions.


NEW QUESTION # 402
Drag and drop the characteristics from the left onto the telemetry mode they apply to on the right.

Answer:

Explanation:


NEW QUESTION # 403
An engineer must design a routing solution for a company that is single-homed to an ISP. The company ' s goal is to run BGP between the CE and the PE devices. To support running BGP, the company obtained a public AS number and IP subnet from ARIN. Which solution must the engineer select?

Answer: A

Explanation:
A single-homed enterprise that runs BGP with one ISP should advertise its assigned public prefix to the ISP and receive a default route from the ISP. Because there is only one upstream provider, the customer does not need the full Internet table to make path-selection decisions; all Internet destinations exit the same provider path. Receiving only a default route conserves memory and CPU on the CE router and simplifies operations.
The customer must still originate its public prefix toward the ISP so the provider can advertise reachability to the Internet. The ISP should not be the originator of the customer-owned ARIN prefix toward the customer; it may advertise that prefix to the Internet after receiving it from the customer. Requesting the full BGP table or even a partial table adds unnecessary scale for a single-homed site. Advertising a default route to the ISP is also wrong because the ISP already owns upstream Internet reachability. Reference topics: single-homed BGP, CE-PE peering, default route, public prefix advertisement, Internet edge design.


NEW QUESTION # 404
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