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Cisco 300-420 Exam Syllabus Topics:

Section	Objectives
Topic 1: WAN and Edge Connectivity Design	- SD-WAN architecture and design considerations - Traditional WAN and internet edge design
Topic 2: Network Services Design	- Routing protocols design (OSPF, EIGRP, BGP) - Multicast and QoS design considerations
Topic 3: Security Design in Enterprise Networks	- Segmentation and access control design - VPN and perimeter security architecture
Topic 4: Network Automation and Programmability	- API-driven network automation concepts - Controller-based networking design
Topic 5: Enterprise Campus Network Design	- Campus LAN architecture - Spine-leaf and hierarchical design models
Topic 6: Enterprise Network Design Principles	- Scalability and high availability design - Design methodologies and best practices

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Cisco Designing Cisco Enterprise Networks Sample Questions (Q371-Q376):

NEW QUESTION # 371
A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?

A. Use BGP with the multipath feature enabled to force traffic via the primary path when available.
B. Use OSPF with a passive-interface command on the backup connection.
C. Use static routes tied to an IP SLA to prefer the primary path while a floating static route points to the backup connection.
D. Use EIGRP to establish a neighbor relationship with the main office via L3VPN MPLS and the IPSEC VPN tunnel.

Answer: B

NEW QUESTION # 372
A customer reports that each time a networking component fails, OSPF recalculates the backup path, with causes a short outage. Which solution must the customer implement to improve this situation?

A. Incremental SPF
B. LFA FRR
C. Aggressive OSPF timers
D. BFD

Answer: B

Explanation:
OSPF Loop-Free Alternate (LFA) Fast Reroute (FRR) allows OSPF to quickly switch (within 50 ms) to a backup path when a primary path fails. Without LFA FRR, OSPF has to re-run SPF to find a new path when the primary path fails. With LFA FRR, OSPF pre-computes a backup path and installs the backup next hop in the forwarding table.
https://networklessons.com/cisco/ccie-routing-switching-written/ospf-loop-free-alternate-lfa-fast- reroute-frr

NEW QUESTION # 373
Refer to the exhibit. Which action would make the router the active VRRP router?

A. Recover interface Serial 1/0.
B. Change the interface tracking priority to 100.
C. Recover interface Serial 1/1.
D. Increase priority in the configuration to 100.

Answer: A

Explanation:
As VRRP Group 30 is configured with preemption all that is required is that the VRRP Priority be higher than that of the current active VRRP router and the current master router priority is 50.

NEW QUESTION # 374
Which two options can you use to configure an EIGRP stub router? (Choose two)

A. not-so-stubby
B. external
C. receive-only
D. totally-stubby
E. summary-only
F. summary

Answer: C,F

NEW QUESTION # 375
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?

A. Advertise the local LAN subnet as a stub network
B. Redistribute the local LAN network using the redistribute connected command
C. Advertise the local LAN using the network command and the passive-interface feature
D. Use a static default route for this site instead of EIGRP

Answer: C

NEW QUESTION # 376
......

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