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Cisco 300-420 exam tests a candidate's knowledge in various areas, including advanced addressing and routing solutions, infrastructure services, network assurance, security services, and virtualization. 300-420 Exam is intended for network designers, network engineers, and network architects who have a solid understanding of Cisco's enterprise networking technologies and solutions.

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Cisco 300-420 (Designing Cisco Enterprise Networks) certification exam is a comprehensive exam that tests the knowledge and skills of network design engineers. 300-420 exam is designed to assess the candidate's ability to design, deploy, and optimize enterprise networks. 300-420 exam is intended for network architects, network designers, and network engineers who have experience with designing and implementing enterprise networks.

Cisco 300-420 Exam is a part of the Cisco Certified Network Professional (CCNP) Enterprise certification track. Designing Cisco Enterprise Networks certification track is designed to validate your skills in enterprise networking solutions, including routing, switching, wireless, and security technologies. The CCNP Enterprise certification is a globally recognized certification that demonstrates your expertise in enterprise-level networking solutions.

Cisco Designing Cisco Enterprise Networks Sample Questions (Q139-Q144):

NEW QUESTION # 139
Refer to the exhibit.

Refer to the exhibit. The full EIGRP routing table is advertised throughout the network. Currently, users experience data loss when any one link in the network fails. An architect optimizes the network to reduce the impact when a link fails. Which solution should the architect include in the design?

Answer: A


NEW QUESTION # 140
Refer to the exhibit.

EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the links to R4. When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?

Answer: D

Explanation:
Explanation
The EIGRP stub routing feature will prevent the remote device from advertising core routes back to the distribution devices. Routes learned by the remote device from Distribution 1 will not be advertised to Distribution 2. Therefore, Distribution 2 will not use the remote device as a transit for traffic destined to the network core
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-eigrp-s


NEW QUESTION # 141
How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?

Answer: D

Explanation:


NEW QUESTION # 142
A company plans to transition to IPv6. They will link their IPv4 addresses to the lowest significant bits of the new Ipv6 addresses. A network administrator with an employee id: 4264:42:116 is preparing a mapping schema for the new IPv6 addresses. Which address does the
172.16.10.0/24 network translate to?

Answer: A

Explanation:
ac10:a00 = 172.16.10.0 and /120 = /24


NEW QUESTION # 143
An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same router levels for each protocol per interface. Which IS-IS design is required?

Answer: D

Explanation:
Single-topology IS-IS with the transition feature is the correct design when IPv6 is being added to an existing IPv4 IS-IS network and both topologies must match exactly. In single-topology mode, IS-IS calculates one topology and uses it for both IPv4 and IPv6, which fits the requirement that the IPv4 and IPv6 paths and router levels remain the same on each interface. Cisco documentation notes that single-topology IS-IS IPv6 requires routers to run the same set of address families for adjacency consistency; during migration, transition support allows the network to operate while IPv6 is introduced gradually. Multi-topology IS-IS is used when IPv4 and IPv6 should be allowed to follow different topologies or when not all routers support the same address families. The question explicitly says the topologies will match exactly, so multi-topology is unnecessary. Single topology without the transition feature is risky during phased migration because routers that do not yet run both address families may fail adjacency checks or create blackholing. Reference topics:
IS-IS for IPv6, single-topology IS-IS, transition mode, address-family consistency, IPv6 migration.


NEW QUESTION # 144
......

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