Sample 300-420 Questions, Test 300-420 Lab Questions

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Cisco 300-420 exam is a 90-minute test with 60-70 multiple-choice questions. 300-420 exam is conducted in English and is available at Pearson VUE test centers worldwide. 300-420 exam fee is $300 USD, and the certification is valid for three years. Candidates who pass the exam will earn the Cisco Certified Design Professional (CCDP) certification.

Cisco 300-420 exam is suitable for IT professionals with a minimum of 3-5 years of experience in designing and implementing enterprise networks. It is ideal for network architects, network engineers, and network designers who want to validate their knowledge and skills in advanced network design. 300-420 Exam is also suitable for IT managers who want to understand the latest trends and best practices in enterprise network design.

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Cisco 300-420 exam covers a wide range of topics, including advanced addressing and routing solutions, network security, virtualization, automation, and network architecture. Candidates are required to demonstrate their understanding of the latest industry trends and best practices in designing enterprise networks. 300-420 Exam consists of multiple-choice questions, and candidates have 90 minutes to complete it. Passing the Cisco 300-420 exam requires a score of at least 750 out of 1000.

Cisco Designing Cisco Enterprise Networks Sample Questions (Q289-Q294):

NEW QUESTION # 289
A network engineer must connect two sites across a public network using a secure tunneling technology that supports multicast traffic. Which technology must be chosen?

A. PPTP
B. IPsec
C. GRE
D. GRE over IPsec

Answer: D

Explanation:
GRE over IPsec is the correct secure tunneling choice when multicast traffic must cross a public network.
Native IPsec protects unicast IP traffic, but it does not inherently carry multicast routing protocols or multicast application flows in the same way that GRE can. GRE creates a logical point-to-point tunnel that can encapsulate multicast, broadcast, and non-IP payloads; IPsec then encrypts the GRE packet for confidentiality and integrity across the untrusted transport. Cisco designs commonly use this combination when dynamic routing protocols, multicast applications, or other non-unicast traffic must be transported securely between sites. GRE by itself supports multicast, but it does not provide encryption, so it fails the secure tunneling requirement. PPTP is obsolete and not appropriate for modern enterprise design. Plain IPsec is secure, but it is not the complete answer when multicast support is explicitly required. Therefore, the design should use GRE over IPsec: GRE supplies the multicast-capable overlay, and IPsec supplies the cryptographic protection across the public network.

NEW QUESTION # 290

Refer to the exhibit. An engineer is designing a BGP solution for a client that peers with ISP1 for full Internet connectivity and with ISP2 for direct exchange of routes for several third parties. Which action, when implemented on the edge routers, enables the client network to reach the Internet through ISP1?

A. Apply route filtering such that the client advertises only routes originated from its own AS.
B. Advertise a default route for downstream routers within the client network.
C. Run an eBGP session within different VRFs for each ISP.
D. Apply the AS-path prepend feature for ISP2.

Answer: B

NEW QUESTION # 291
A network engineer discovers that an alternate or root port on a Cisco Layer 2 switch intermittently becomes the designated port, which causes an STP loop. What must be configured to resolve the issue?

A. UDLD
B. STP root guard
C. STP loop guard
D. PortFast BPDU guard

Answer: C

Explanation:
STP loop guard prevents alternate or root ports from becoming designated ports when they stop receiving BPDUs, which protects against STP loops caused by unidirectional or intermittent link failures.

NEW QUESTION # 292
A company is expanding its headquarters to support the relocation of several departments. The network has been running RIP, but as the company has grown, the engineering team has determined that it needs to support a more robust routing protocol. The team is working to design a routing solution that:
- supports network segregation, with summarization between segments
- ensures fast convergence
- provides scalability
Which design must the network team deploy?

A. Deploy OSPF with multiple areas.
B. Deploy EIGRP with stub areas.
C. Deploy OSPF with a virtual link that connects at least two segments.
D. Deploy EIGRP with modified K values.

Answer: A

Explanation:
Deploying OSPF with multiple areas allows network segregation and supports route summarization between areas, providing scalability. OSPF ensures fast convergence and is well- suited for growing networks that require structured hierarchical routing.

NEW QUESTION # 293
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?

A. Advertise only the default route.
B. Summarize the local subnets.
C. Configure the stub router in receive-only mode.
D. Configure the stub router in redistributed mode.

Answer: C

Explanation:
Configuring an EIGRP stub router with receive-only allows it to learn routing information from its neighbors while preventing it from advertising any routes. This ensures that WAN routes are not propagated to the data center routers.

NEW QUESTION # 294
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