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Cisco 300-420 Exam Syllabus Topics:

Section	Objectives
Network Automation and Programmability	- API-driven network automation concepts - Controller-based networking design
Enterprise Network Design Principles	- Scalability and high availability design - Design methodologies and best practices
Security Design in Enterprise Networks	- VPN and perimeter security architecture - Segmentation and access control design
Network Services Design	- Routing protocols design (OSPF, EIGRP, BGP) - Multicast and QoS design considerations
Enterprise Campus Network Design	- Spine-leaf and hierarchical design models - Campus LAN architecture
WAN and Edge Connectivity Design	- Traditional WAN and internet edge design - SD-WAN architecture and design considerations

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Cisco Designing Cisco Enterprise Networks Sample Questions (Q166-Q171):

NEW QUESTION # 166
Drag and drop the elements from the left onto the functions they perform in the Cisco SD-WAN architecture on the right.

Answer:

Explanation:

Explanation

Table Description automatically generated

NEW QUESTION # 167
Which feature is required for graceful restart to recover from a processor failure?

A. Virtual Switch System
B. Bidirectional Forwarding Detection
C. Stateful Switchover
D. Cisco Express Forwarding

Answer: C

Explanation:
Graceful restart and nonstop forwarding designs depend on preserving forwarding continuity during a control- plane processor switchover. Cisco Stateful Switchover provides the mechanism for a standby route processor or supervisor to maintain synchronized state so it can assume control when the active processor fails. When SSO is combined with NSF or graceful restart capabilities in routing protocols, neighboring devices can continue forwarding traffic while the restarting device preserves or rebuilds control-plane adjacencies. Cisco Express Forwarding is required for fast data-plane forwarding, but CEF alone does not provide route processor state synchronization after processor failure. Virtual Switch System is a chassis or switching architecture that can provide high availability in certain campus designs, but it is not the required feature named by graceful restart recovery. Bidirectional Forwarding Detection is a failure-detection protocol used to detect path or neighbor failures quickly; it does not recover a failed processor. Therefore, the feature that must be incorporated for graceful restart recovery from processor failure is Stateful Switchover. In a resilient enterprise design, SSO, NSF, and protocol graceful restart are coordinated to reduce outage impact.

NEW QUESTION # 168
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?

A. Run BFD on the inter links between EIGRP neighbors.
B. Reduce the default EIGRP hello interval and hold time.
C. Summarize the access layer networks from each access layer switch toward the aggregation layer.
D. Summarize the access layer networks from the aggregation layer toward the core layer.

Answer: A

NEW QUESTION # 169
In a Cisco SD-Access fabric, switch node Is equivalent to an access layer switch In a traditional three-tier campus network design?

A. edge node
B. control plane node
C. border node
D. intermediate node

Answer: A

Explanation:
The Cisco SD-Access edge node is equivalent to the access-layer switch in a traditional three-tier campus design. Edge nodes are the fabric devices to which wired endpoints, access points, and other user-facing connections attach. They provide the anycast Layer 3 gateway for connected subnets, classify endpoints into virtual networks, apply policy information, and register endpoint reachability with the SD-Access control- plane node. In traditional campus terminology, this is the role normally performed by access switches at the edge of the network. Border nodes connect the SD-Access fabric to external networks, such as the WAN, data center, internet edge, or shared services. Intermediate nodes provide underlay transport between fabric nodes but do not attach endpoints to the fabric overlay. Control-plane nodes maintain mapping information rather than serving as access-layer attachment points. Understanding the edge-node role is fundamental because SD- Access policy and host mobility begin where the endpoint enters the fabric. Reference topics: SD-Access edge node, access layer, anycast gateway, endpoint registration, fabric roles.

NEW QUESTION # 170
Which security functionality does gRPC provide?

A. mandatory encryption of data at rest using the AES and RSA protocols
B. implementing secure server-client tunnels with RSA 2048 cipher encryption
C. supporting secure communication between network devices and control systems using TLS and HTTPS
D. enabling RC6 data-level encryption with CRC check

Answer: C

NEW QUESTION # 171
......

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