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The Cisco 300-420 exam consists of multiple-choice and simulation questions and requires the candidate to demonstrate their proficiency in designing and implementing complex network solutions. 300-420 Exam is conducted in a proctored environment, and candidates are provided with four hours to complete the test.
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Cisco 300-420 is an advanced level certification exam for designing Cisco enterprise networks. 300-420 exam is designed to test the expertise of network architects and engineers who are responsible for designing and implementing complex enterprise network solutions. Designing Cisco Enterprise Networks certification is highly valued in the industry and is considered a benchmark for networking professionals.
NEW QUESTION # 409
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?
Answer: A
Explanation:
For streaming multimedia over a WAN using DiffServ per-hop behavior, the best answer is CBWFQ with DSCP AF3. Cisco QoS design separates real-time interactive voice from streaming multimedia. Voice bearer traffic commonly uses EF and a strict priority queue because it is extremely sensitive to delay and jitter.
Streaming multimedia, however, is usually buffered and bandwidth-intensive; it should receive assured bandwidth and controlled drop behavior rather than strict priority treatment. The Assured Forwarding classes are designed for this kind of preferential forwarding within DiffServ. AF3 is commonly associated with multimedia streaming in Cisco QoS baseline models, while CBWFQ provides bandwidth guarantees without allowing the class to starve other traffic. LLQ with EF is too aggressive for streaming multimedia and should be reserved for voice bearer traffic or similarly strict real-time flows. AF2 is more commonly used for transactional data or lower-priority assured service, depending on the model. The correct marking and queuing design is therefore CBWFQ with DSCP AF3. Reference topics: DiffServ, per-hop behavior, CBWFQ, DSCP AF classes, multimedia streaming QoS.
NEW QUESTION # 410
Which two LISP components are required in the Cisco SD-Access fabric control plane node?
(Choose two.)
Answer: B,D
NEW QUESTION # 411
Drag and drop the Cisco SD-WAN components from the left onto their definitions on the right.
Answer:
Explanation:
NEW QUESTION # 412
Refer to the exhibit.
A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a network failure. In the event of a failure, link 2 should function as the path for incoming traffic. Which solution should the design include?
Answer: D
NEW QUESTION # 413
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: B
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 # 414
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