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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced Enterprise Campus Networks | 25% | - Design Layer 2 and Layer 3 campus networks - Design campus network services (QoS, multicast, etc.) - Design for high availability |
| Topic 2: WAN for Enterprise Networks | 20% | - Design QoS for WAN - Design SD-WAN solution - Design WAN connectivity |
| Topic 3: Enterprise Campus Security | 20% | - Design network security - Design network access control |
| Topic 4: Services | 10% | - Design network management - Design end-to-end QoS policy |
| Topic 5: Advanced Addressing and Routing Solutions | 25% | - Determine IPv6 migration strategy - Create structured addressing designs - Create stable, secure, and scalable routing designs for Layer 3 |
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NEW QUESTION # 275
A network engineer must design an MSDP multicast solution to provide RP resilience in a network with two separate domains. Also, multicast sources and receivers must register with the local RP. Which solution must the engineer choose?
Answer: C
Explanation:
Two or more RPs are configured with the same IP address (for example, 10.0.0.1) on loopback interfaces. The loopback address should be configured with a 32-bit mask. All the downstream routers are configured so that they know that 10.0.0.1 is the IP address of their local RP. IP routing automatically selects the topologically closest RP for each source and receiver.
https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/Phase_1/mcstmsdp/mcst_ p1.html
NEW QUESTION # 276
An engineer must propose a solution for a campus network that includes the capability to create multiple Layer 3 virtual networks. Each network must have its own addressing structure and routing table for data forwarding. The solution must be scalable to support hundreds of virtual networks and allow simple configuration and management with minimal administrative overhead. Which solution does the engineer recommend?
Answer: D
NEW QUESTION # 277
Mobile service provider "A" is going to launch 5G support with the ISP "B" IP network backbone as the underlay transport. Conversational traffic type will be marked with expedited forwarding class, streaming services will be marked with assured forwarding 2 class, and web browsing will be marked with assured forwarding 3 class. Which QoS model meets these requirements if the solution is to be implemented end to end on the ISP_B backbone network?
Answer: B
Explanation:
The correct model is a 4-class QoS strategy with DiffServ. The traffic classes listed in the question are explicitly DiffServ per-hop behaviors: Expedited Forwarding for conversational traffic, Assured Forwarding class 2 for streaming, and Assured Forwarding class 3 for web or interactive traffic. Cisco QoS guidance uses DiffServ to classify and mark traffic with DSCP values, then apply per-hop behavior at each node along the path. This gives scalable end-to-end treatment across a provider backbone without maintaining per-flow reservations. The four service treatments implied are conversational, streaming, interactive/web, and background or best effort, which matches the stated service categories without unnecessary class expansion.
IntServ is not appropriate for an ISP backbone because it uses RSVP-style per-flow signaling and state, which scales poorly compared with DiffServ PHB handling. The 8-class and 12-class options add complexity beyond the stated mappings. Reference topics: DiffServ, DSCP, EF, AF2, AF3, per-hop behavior, provider QoS design.
NEW QUESTION # 278
Which common issue causes intermittent DMVPN tunnel flaps?
Answer: D
Explanation:
Intermittent DMVPN tunnel flaps are commonly caused by reachability problems between routing neighbors or between the tunnel endpoints that support those neighbors. DMVPN depends on several layers working correctly: the underlay transport, GRE tunnel interface, NHRP registration and resolution, IPsec protection if used, and the routing protocol running across the tunnel. If the routing neighbor cannot remain reachable, the tunnel may appear to flap even though the encryption profile itself is not the root cause. A suboptimal routing table can produce poor forwarding or asymmetric traffic, but it is not the most common direct cause of repeated tunnel up/down events. Bandwidth congestion can degrade performance, but a correctly designed tunnel does not flap merely because utilization is high unless keepalives, NHRP, or routing packets are being lost. The fact that a GRE tunnel is not encrypted is a security design problem, not a tunnel-flap cause. The right troubleshooting posture is to verify stable underlay reachability, tunnel interface state, NHRP mappings, and routing adjacency stability before assuming an IPsec encryption failure.
NEW QUESTION # 279
Which design element should an engineer consider when multicast is included in a Cisco SD- Access architecture?
Answer: D
Explanation:
Multicast traffic is transported in the overlay, in the EID space, for both wired and wireless clients.
https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2018/pdf/BRKEWN-2020.pdf
NEW QUESTION # 280
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