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Cisco 300-420 exam is an excellent certification for network engineers who want to advance their careers and demonstrate their expertise in designing advanced Cisco Enterprise Networks. By passing 300-420 exam, you will be able to demonstrate your knowledge and skills to potential employers and clients, and you will be able to take on more challenging and rewarding network design projects.

Cisco 300-420 exam, also known as Designing Cisco Enterprise Networks (ENSLD), is a certification exam that tests the knowledge and skills of network engineers in designing enterprise-level networks using Cisco technologies. 300-420 Exam is part of the Cisco Certified Network Professional (CCNP) certification track and is intended for professionals who have at least three to five years of experience in designing and implementing enterprise networks.

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Exam Policies for 300-420

There are some policies that one should know before going for the Cisco 300-420 Exam. They will give you a clear idea as to the official requirements for those who can earn the certificates:

Cisco Designing Cisco Enterprise Networks Sample Questions (Q13-Q18):

NEW QUESTION # 13
An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology.
The network will support an engineering environment where it is necessary for end users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning tree topology is not affected by these rogue switches?

Answer: C

Explanation:
Root guard is the correct feature when the design must allow switches to be attached for testing but prevent those switches from influencing the spanning-tree root placement. Cisco root guard protects the intended STP root by placing a port into a root-inconsistent state if superior BPDUs are received on a port where the root should never appear. This directly addresses the risk created by rogue or lab switches connected by end users:
if a user switch advertises a better bridge priority, the production access topology is not allowed to reconverge around that unauthorized device. BPDU guard is usually used on PortFast edge ports to err-disable a port that receives any BPDU, which is excellent for strict host-only ports but less aligned with the wording that users may connect their own switches for testing. Loop guard protects root or alternate ports from losing BPDUs and accidentally forwarding. BPDU skew detection is a diagnostic feature, not the correct design control.
Therefore, root guard is the appropriate protection against rogue switches affecting STP topology. Reference topics: STP root placement, root guard, superior BPDUs, campus Layer 2 protection.


NEW QUESTION # 14
Refer to the exhibit.

Refer to the exhibit. Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal. Which design provides optimal routing between both networks when the link between routers C and E fails?

Answer: B


NEW QUESTION # 15
In a Cisco SD-Access fabric, which node facilitates connectivity between the fabric and networks external to the fabric?

Answer: B


NEW QUESTION # 16
When vEdge router redundancy is designed, which FHRP is supported?

Answer: C


NEW QUESTION # 17
Refer to the exhibit. An architect must develop an EIGRP routing solution to ensure that all links between network A and network B are used for forwarding traffic. Which solution must the architect select?

Answer: A

Explanation:
EIGRP variance enables unequal-cost load balancing by allowing feasible routes with metrics up to a configured multiple of the best route metric. The best path has a metric of 15, and the highest path metric that must be included is 70. A variance of 5 allows routes up to 75, so all available links between the two networks can be used for forwarding.


NEW QUESTION # 18
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