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Cisco 300-420 Exam Syllabus Topics:

Section	Weight	Objectives
Advanced Enterprise Campus Networks	25%	- Design campus network services (QoS, multicast, etc.) - Design Layer 2 and Layer 3 campus networks - Design for high availability
WAN for Enterprise Networks	20%	- Design QoS for WAN - Design WAN connectivity - Design SD-WAN solution
Advanced Addressing and Routing Solutions	25%	- Create structured addressing designs - Create stable, secure, and scalable routing designs for Layer 3 - Determine IPv6 migration strategy
Enterprise Campus Security	20%	- Design network security - Design network access control
Services	10%	- Design end-to-end QoS policy - Design network management

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Cisco Designing Cisco Enterprise Networks Sample Questions (Q106-Q111):

NEW QUESTION # 106
An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?

A. IEEE
B. Native
C. IETF
D. OpenConfig

Answer: C

NEW QUESTION # 107
Which feature is required for graceful restart to recover from a processor failure?

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

Answer: A

Explanation:
Explanation
https://archive.nanog.org/meetings/nanog42/presentations/Weissner_SSO.pdf The Stateful Switchover (SSO) feature works with Nonstop Forwarding (NSF) in Cisco software to minimize the amount of time a network is unavailable to its users following a switchover. The primary objective of SSO is to improve the availability of networks constructed with Cisco routers.

NEW QUESTION # 108
Refer to the exhibit. An engineer must ensure that the QoS design guarantees bandwidth for the applications, and an application can request a particular type of service to support its delay requirements. Which solution must the engineer select?

A. DiffServ with RSVP
B. DiffServ with DSCP
C. IntServ with DSCP
D. IntServ with RSVP

Answer: D

Explanation:
The correct solution is IntServ with RSVP. The requirement says the application must be able to request a specific service level and receive guaranteed bandwidth with support for delay requirements. Cisco describes Integrated Services as a QoS model that uses Resource Reservation Protocol to signal per-flow resource requirements across the network. RSVP allows applications or endpoints to request bandwidth and delay treatment; each participating network device can admit or reject the reservation based on available resources.
This is exactly the behavior needed when an application must explicitly request a service profile rather than simply inherit a class marking. DiffServ with DSCP is more scalable, but it only marks traffic and applies class-based per-hop behavior. It does not provide per-flow reservation or allow the application to explicitly reserve resources. DSCP by itself is a marking mechanism, not a reservation protocol. RSVP belongs with IntServ in the classic QoS model. Reference topics: Integrated Services, RSVP, resource reservation, QoS guarantees, delay-sensitive applications.

NEW QUESTION # 109
What does the fabric data plane leverage in SD-Access Architecture?

A. LISP protocol to resolve endpoint-to-location mapping
B. MAC-in-IP encapsulation method to transport of the Layer 2 frame
C. BGP protocol to advertise endpoint prefixes outside of the fabric
D. IS-IS protocol to exchange link-state routing information

Answer: B

NEW QUESTION # 110

Refer to the exhibit. A customer has two eBGP peerings from a single CE router toward two service providers. The customer has hired an architect to design a solution to ensure certain traffic enters the customer's network through interface g.g0/0. Which solution must the architect include in the design?

A. Set a higher local preference to the preferred service provider path.
B. Prepend additional AS on the AS path toward the preferred service provider.
C. Advertise a lower MED value toward the less preferred service provider.
D. Break aggregated routes into longer prefixes and advertise to the preferred service provider.

Answer: D

NEW QUESTION # 111
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