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| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Designing Cisco Enterprise Networks (ENSLD) |
| Exam Number: | 300-420 ENSLD |
| Real Exam Qty: | 55-65 |
| Exam Format: | Multiple response, Drag and drop, Simulation-based questions, Multiple choice |
| Exam Price: | $300 USD |
| Available Languages: | Simplified Chinese, Japanese, English |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Related Certifications: | CCNP Enterprise CCIE Enterprise Infrastructure |
| Recommended Training: | Cisco Learning Network - ENSLD Cisco Official Training (Designing Cisco Enterprise Networks) |
| Exam Registration: | Cisco Certification Exam Registration Pearson VUE Cisco Exams |
| Sample Questions: | Cisco 300-420 Sample Questions |
| Exam Way: | Available via Pearson VUE test centers or online proctored exam |
| Pre Condition: | No formal prerequisites required. Recommended: CCNA-level knowledge and CCNP Enterprise core exam (350-401 ENCOR). |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/300-420-ensld.html |
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Cisco 300-420 Exam, also known as Designing Cisco Enterprise Networks (ENSLD), is a certification exam that focuses on designing advanced enterprise network solutions. 300-420 exam is intended for network architects, network engineers, and other IT professionals who are responsible for designing, deploying, and maintaining Cisco enterprise network solutions.
NEW QUESTION # 86 
Refer to the exhibit. A company specializing in VoD content creation has two offices in a separate multicast domain connected by a WAN link. BGP communication has been established between the offices. Clients are inside the LAN in each office. In AS5373. R2 has been selected as RP. What must the network architect design to deliver VoD content to clients in AS65773?
Answer: D
Explanation:
MSDP is required because the design connects separate PIM-SM multicast domains and needs multicast source discovery across domain boundaries. In each autonomous system, receivers join a multicast group through the local rendezvous point. Without MSDP, an RP in one domain does not automatically learn about active sources registered to an RP in another domain. MSDP allows RPs to exchange Source-Active information so that receivers in AS65773 can learn about VoD sources in AS5373 and build the required multicast forwarding state. Auto-RP and BSR are mechanisms for discovering or advertising rendezvous point information inside a PIM domain; they do not solve interdomain source discovery between separate multicast domains. PIM SSM can work for source-specific applications, but the question states that R2 has been selected as RP, which indicates an ASM/PIM-SM design. With BGP already established between offices, MSDP complements the interdomain routing design by exchanging multicast source reachability information.
Reference topics: MSDP, PIM-SM, interdomain multicast, Source-Active messages, rendezvous point resilience.
NEW QUESTION # 87
An architect must design a QoS model for a business-critical application that Is delay-sensitive and requires high bandwidth. The company ' s head office hosts the application, and DMVPN tunnels protected with IPsec provide connectivity between the head office and branches. Which solution must the architect choose?
Answer: D
Explanation:
DiffServ is the correct QoS model for a business-critical, delay-sensitive, high-bandwidth application across DMVPN tunnels protected with IPsec. Differentiated Services classifies and marks traffic, usually with DSCP, and then applies per-hop behavior at each network device. This model scales well across enterprise WANs because routers do not need to maintain per-flow reservation state. DMVPN and IPsec overlays can carry marked traffic, and the WAN design can apply queuing, shaping, and congestion avoidance based on those markings. IntServ with RSVP can provide explicit resource reservation, but it is stateful and does not scale well across many branch tunnels. RSVP also becomes operationally difficult across encrypted overlay environments. WRED is only a congestion avoidance mechanism, not a complete QoS architecture. Because the application needs differentiated treatment but the WAN must remain scalable, DiffServ is the practical Cisco enterprise design model. Reference topics: DiffServ, DSCP marking, DMVPN QoS, IPsec QoS pre- classify, per-hop behavior, enterprise WAN QoS.
NEW QUESTION # 88
Which node performs the LISP Map-Server and Map-Resolver functions in the Cisco SD-Access network architecture?
Answer: A
Explanation:
The SD-Access control-plane node performs the LISP Map-Server and Map-Resolver functions. Cisco SD- Access uses LISP in the control plane to maintain mappings between endpoint identifiers and routing locators.
Fabric edge nodes discover local endpoints and register them with the control-plane node. When a destination endpoint is not known locally, a fabric node queries the control-plane node, which resolves the endpoint location and returns the locator information needed for VXLAN forwarding through the fabric. This is why the control-plane node is the correct answer. A fabric edge node connects endpoints, provides the anycast gateway, encapsulates and decapsulates user traffic, and registers endpoints. A border node connects the fabric to external networks. An intermediate node simply transports routed underlay traffic between fabric nodes and does not hold endpoint mappings. In design terms, control-plane placement and redundancy are critical because endpoint mobility, fabric forwarding lookup, and location resolution depend on stable Map- Server and Map-Resolver services. Reference topics: Cisco SD-Access control plane, LISP Map-Server, LISP Map-Resolver, EID-to-RLOC mapping, fabric edge registration.
NEW QUESTION # 89
Refer to the exhibit. An architect is designing an IPv4 plan using the 172.20.0.0/16 network. The design must maximize the number of subnets and minimize the number of wasted IP addresses.
In addition, the plan must allocate a subnet to these customers and links:
- Customer A, which supports 125 hosts
- Customer D, which supports 62 hosts
- Links B, C, and E
Which two configuration sets meet these requirements? (Choose two.)
Answer: A,C
Explanation:
172.20.0.128/25 for Customer A supports 128 IPs (126 usable), which fits 125 hosts.
172.20.1.0/26 for Customer D supports 64 IPs (62 usable), which fits 62 hosts.
/30 subnets (172.20.1.68/30, 172.20.1.72/30, 172.20.1.76/30) provide 4 IPs each (2 usable), ideal for point-to-point links, maximizing subnet usage and minimizing waste.
NEW QUESTION # 90 
Refer to the exhibit. Customers report low video quality and delays when having point-to-point telepresence video calls between the two locations. An architect must optimize a design so that traffic follows the same path for egress and ingress traffic flows. Which technique optimizes the design?
Answer: C
NEW QUESTION # 91
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