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This section makes up 10% of the whole content and requires that the students possess an understanding of the following processes:
| Section | Weight | Objectives |
|---|---|---|
| WAN for Enterprise Networks | 20% | -Compare WAN connectivity options
-Design site-to-site VPN
-Design high availability for enterprise WAN
-Describe Cisco SD-WAN Architecture (orchestration plane, management plane, control plane, data plane, on-boarding and provisioning, security) |
| Network Services | 20% | -Select appropriate QoS strategies to meet customer requirements (DiffServ, IntServ) -Design end-to-end QoS policies
-Design network management techniques
-Describe multicast routing concepts (source trees, shared trees, RPF, rendezvous points) |
| Advanced Addressing and Routing Solutions | 25% | -Create structured addressing plans for IPv4 and IPv6 -Create stable, secure, and scalable routing designs for IS-IS -Create stable, secure, and scalable routing designs for EIGRP -Create stable, secure, and scalable routing designs for OSPF -Create stable, secure, and scalable routing designs for BGP
-Determine IPv6 migration strategies
|
| Advanced Enterprise Campus Networks | 25% | - Design campus networks for high availability
-Design campus Layer 2 infrastructures
-Design multicampus Layer 3 infrastructures
-Describe SD-Access Architecture (underlay, overlay, control and data plane, automation, wireless, and security) |
| Automation | 10% | - Choose the correct YANG data model set based on requirements -Differentiate between IETF, Openconfig, and Cisco native YANG models -Differentiate between NETCONF and RESTCONF -Describe the impact of model-driven telemetry on the network
-Compare dial-in and dial-out approaches to model-driven telemetry |
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NEW QUESTION # 252 
Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:
*conserve bandwidth, memory, and CPU processing
*prevent suboptimal routing
*avoid any unnecessary queries
Which two solutions must the architect select? (Choose two.)
Answer: D,E
Explanation:
Route summarization and EIGRP stub routing are the two correct design techniques for a stable and scalable EIGRP deployment. Summarization reduces the number of prefixes advertised upstream, conserves bandwidth and memory, hides route flaps behind the summary boundary, and reduces the size of the EIGRP topology table. Stub routing prevents branch or access devices from being used as transit routers and limits the scope of EIGRP queries. This is critical because uncontrolled EIGRP query propagation can increase convergence time and processing load, especially in larger hierarchical networks. Prefix lists and distribute lists can filter routes, but filtering alone does not provide the same query-boundary and topology-hiding benefits as summarization and stubs. Static redistribution increases complexity and can create loop or policy risks if not controlled with tags and metrics. The question specifically asks to conserve bandwidth, memory, and CPU, prevent suboptimal routing, and avoid unnecessary queries; summarization and stub routing are the direct Cisco design answers. The architect should summarize at hierarchy boundaries and configure access or branch routers as EIGRP stubs where they should not provide transit. Reference topics: EIGRP summarization, EIGRP stub routing, query scope, hierarchical routing.
NEW QUESTION # 253
In a cisco SD-Access brownfield deployment scenario, which configuration deployment must be taken with Cisco DNA center?
Answer: B
Explanation:
Manual underlay is the correct deployment approach for a brownfield SD-Access scenario. In a greenfield fabric, Cisco DNA Center LAN Automation can build the routed underlay by discovering devices, assigning addresses, and creating the required underlay adjacencies. Brownfield environments already have an installed campus network, addressing plan, routing policy, operational constraints, and production dependencies.
Rebuilding that underlay automatically can introduce unnecessary disruption. Cisco SD-Access brownfield designs normally preserve and validate the existing routed underlay, then use Cisco DNA Center to discover devices and automate the fabric overlay, policy, and endpoint segmentation functions. Subnet stretching is not the required deployment model and can create operational complexity. Automated underlay and LAN automation are powerful when the physical network is being newly built, but they are not the safest default for an established production environment. A professional brownfield design should first confirm MTU, routing reachability, loopback advertisements, device support, and fabric readiness before onboarding nodes.
Reference topics: SD-Access brownfield migration, manual underlay, Cisco DNA Center, LAN Automation, fabric readiness.
NEW QUESTION # 254
A network engineer must segregate three interconnected campus networks using IS-IS routing. A two-layer hierarchy must be used to support large routing domains and to avoid more specific routes from each campus network being advertised to other campus network routers automatically. Which two actions does the engineer take to accomplish this segregation? (Choose two.) Designate two IS-IS routers as BDR routers at the edge of each campus, and configure one BDR for all Level 1 routers and one BDR for all Level 2 routers.
Answer: B
NEW QUESTION # 255 
Refer to the exhibit. An architect working for a service provider with an employee ID: 4763:44:876 must design a Layer 2 VPN solution that supports:
* transparency of service provider devices
* direct communication between CE routers attached to the same VLAN
Which solution must the design include?
Answer: A
Explanation:
A single VPLS instance is the correct Layer 2 VPN design because the customer requires service-provider transparency and direct communication between CE routers attached to the same VLAN. Virtual Private LAN Service provides a multipoint Ethernet LAN service across a provider MPLS or IP backbone. To the customer, the provider network behaves like a transparent Layer 2 switching domain, allowing CE devices in the same VLAN to communicate directly at Layer 2. VPWS is point-to-point, so multiple VPWS circuits would be required to approximate multipoint connectivity, and the design would not provide the same transparent shared LAN behavior. Multiple VPLS instances are unnecessary when the requirement is a single VLAN or single broadcast domain. VPLS also hides provider devices from the customer Layer 2 service view while allowing MAC learning and forwarding across the provider edge. Reference topics: VPLS, Layer 2 VPN, multipoint Ethernet service, CE transparency, VLAN extension, service provider WAN design.
NEW QUESTION # 256
Which three ways are SD-Access and ACI Fabric similar? (Choose three.)
Answer: A,D,E
NEW QUESTION # 257
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