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| Section | Objectives |
|---|---|
| Topic 1: Network Services Design | - Routing protocols design (OSPF, EIGRP, BGP) - Multicast and QoS design considerations |
| Topic 2: Enterprise Campus Network Design | - Campus LAN architecture - Spine-leaf and hierarchical design models |
| Topic 3: Enterprise Network Design Principles | - Design methodologies and best practices - Scalability and high availability design |
| Topic 4: Security Design in Enterprise Networks | - VPN and perimeter security architecture - Segmentation and access control design |
| Topic 5: Network Automation and Programmability | - API-driven network automation concepts - Controller-based networking design |
| Topic 6: WAN and Edge Connectivity Design | - SD-WAN architecture and design considerations - Traditional WAN and internet edge design |
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NEW QUESTION # 176 
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?
Answer: D
Explanation:
IntServ with RSVP is the correct model when an application must request a specific service level and receive guaranteed bandwidth or delay treatment. Cisco describes the Integrated Services model as a flow-based QoS architecture in which applications signal their resource requirements to the network. RSVP is the signaling protocol used to reserve resources along the path. This differs from DiffServ, which marks packets and applies per-hop behavior without creating per-flow reservations. The question states that the application can request a particular type of service to support its delay requirements and that bandwidth must be guaranteed.
Those are classic IntServ and RSVP characteristics. DiffServ with DSCP is scalable and widely used in enterprise networks, but it cannot guarantee resources end to end unless every hop is engineered and provisioned accordingly. IntServ with DSCP is not the standard model because RSVP is the reservation mechanism. Reference topics: Integrated Services, RSVP, resource reservation, guaranteed service, QoS architecture, delay-sensitive applications.
NEW QUESTION # 177
Which design consideration must be made when dual WAN Edge routers are deployed at a branch site?
Answer: C
NEW QUESTION # 178 
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: B
NEW QUESTION # 179
Refer to the exhibit.
An architect is designing an EIGRP solution based on these requirements:
* Traffic forwarding should use the best two paths while all links are available
* Single path failure must not impact traffic between branch and HQ
Which solution must the architect select?
Answer: B
Explanation:
ENSLD cert guide page 113. shortest path = 900, next 1700 and finally 3300 for the worst path. Witch variance 2, all routes under 1800 (900x2) become active.
NEW QUESTION # 180
Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?
Answer: D
Explanation:
Area 1 should be an NSSA because of the ASBR advertising EIGRP routes.
NEW QUESTION # 181
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