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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Software-Defined Access (SDA) | 5% | - SD-Access architecture - Control plane and data plane design - Fabric design and deployment |
| Topic 2: Security Services | 10% | - Secure connectivity - Security architecture design
|
| Topic 3: WAN for Enterprise Networks | 20% | - WAN resiliency and high availability - WAN connectivity options
|
| Topic 4: Advanced Addressing and Routing Solutions | 25% | - IPv4 and IPv6 addressing design
|
| Topic 5: Advanced Enterprise Campus Networks | 25% | - Layer 2 campus design
- Layer 3 campus design
|
| Topic 6: Network Services | 15% | - Multicast design - IP services
|
>> Latest 300-420 Questions <<
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NEW QUESTION # 39 
Refer to the exhibit. An architect is designing a hierarchical ISIS solution for a customer with these requirements:
* Routers will double In all areas within the next 24 months.
* Link flaps within areas 20 and 30 must not impact the backbone area.
* Traffic originating from A201 and A302 routers must connect to application servers in the backbone.
Which design must the architect select?
Answer: B
Explanation:
The selected IS-IS design must place the correct routers as Level 1/Level 2 boundary routers so that area failures stay local while traffic can still reach backbone application services. In a hierarchical IS-IS design, Level 1 routers exchange detailed topology only inside their own area. Level 2 routers form the backbone used for interarea connectivity. L1/L2 routers connect the local area to the backbone and advertise reachability between the two levels. Areas 20 and 30 are expected to double in size, and link flaps inside those areas must not impact the backbone. Therefore, the design should keep internal area routers at Level 1 and use only the boundary devices that connect those areas to the backbone as L1/L2. Option A matches that principle by selecting the appropriate boundary routers for interlevel connectivity while avoiding unnecessary L1/L2 adjacencies throughout the topology. The other options either place the wrong routers in Level 2 only or fail to provide a clean transition between local areas and the backbone. Reference topics: IS-IS hierarchy, L1/L2 boundary design, area containment, backbone stability, route leaking.
NEW QUESTION # 40
Which design consideration should be observed when EIGRP is configured on Data Center switches?
Answer: A
Explanation:
The correct EIGRP design consideration is to prevent unnecessary neighborships from forming across switch virtual interfaces. In a data center or campus switching environment, many SVIs may exist for VLAN default gateways, but those VLANs do not necessarily need EIGRP adjacencies with attached hosts, firewalls, load balancers, or peer switches. Cisco EIGRP design commonly uses passive-interface behavior to advertise connected networks while suppressing EIGRP hello packets on interfaces where neighbor relationships are not required. This reduces control-plane noise, minimizes accidental adjacencies, and limits the failure domain. Manual summarization is useful at hierarchy boundaries, but performing summarization on all Layer
3 interfaces can create black holes or hide topology detail where it is still needed. Lowering hello and hold timers to minimum values can increase CPU load and is not the primary design recommendation. Multiple EIGRP autonomous systems may be used for specific segmentation designs, but they add redistribution and operational complexity. Therefore, preventing unnecessary EIGRP neighborships across SVIs is the best design practice from the choices.
NEW QUESTION # 41
How is internet access provided to a WAN edge router that is connected to a MPLS transport link?
Answer: C
Explanation:
TLOC extension is the Cisco SD-WAN mechanism that allows a WAN Edge router without direct access to a transport to reach that transport through another WAN Edge router at the same site. Cisco describes TLOC extension as a redundancy feature in SD-WAN networks. In the question, the WAN Edge router is connected to an MPLS transport link, but Internet access is available through another WAN Edge device. With TLOC extension, the MPLS-only edge can extend traffic through the peer router toward the Internet transport, allowing the site to use multiple transports without requiring every edge router to have a physical connection to every circuit. OMP can advertise routes and TLOCs, but OMP alone does not create physical Internet access for a router attached only to MPLS. Requiring a local 4G/5G or Internet circuit on the same router is not necessary when TLOC extension is part of the design. An MPLS extranet is also not the normal SD-WAN solution for Internet transport reachability. Therefore, TLOC extension is the correct design method.
NEW QUESTION # 42
An engineer uses Postman and YANG to configure a router with:
- OSPF process ID 200
- network 172.16.10.128/26 enabled for Area 0
Which get-config reply verifies that the model set was designed correctly?
Answer: B
NEW QUESTION # 43
Refer to the exhibit. An architect is designing a Layer 3 campus network. The design must hide network instability, reduce network overhead, and conserve critical device memory. Which route summarization solution must the architect select?
Answer: C
NEW QUESTION # 44
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