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| Section | Weight | Objectives |
|---|---|---|
| Security Services | 10% | - Secure connectivity - Security architecture design
|
| Software-Defined Access (SDA) | 5% | - Control plane and data plane design - SD-Access architecture - Fabric design and deployment |
| Network Services | 15% | - Quality of Service (QoS)
- IP services
|
| Advanced Enterprise Campus Networks | 25% | - Layer 3 campus design
- Layer 2 campus design
|
| Advanced Addressing and Routing Solutions | 25% | - IPv4 and IPv6 addressing design
|
| WAN for Enterprise Networks | 20% | - WAN resiliency and high availability - VPN design
|
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214. Frage
Which feature minimizes HOC connections and reduces strain on the vSmart controller m an SO-WAN architecture?
Antwort: C
Begründung:
Affinity is the SD-WAN feature used to control and reduce control connections between WAN Edge devices and vSmart controllers. Cisco SD-WAN high-availability documentation describes controller affinity as a way to limit the number of controllers that an edge device establishes control connections with, while still preserving controller and data center redundancy. This reduces unnecessary control-plane load and limits the strain placed on vSmart controllers in large overlays. The feature is particularly useful when multiple vSmart controllers exist across multiple data centers and the designer wants predictable primary and backup controller relationships. The color attribute identifies transport characteristics, such as public Internet, MPLS, or other transport types. Control-connections is a general concept, not the feature that minimizes them. Control- direction is not the correct design construct for this purpose. A scalable SD-WAN design should use affinity where controller scale, regionalization, and control-plane efficiency must be explicitly managed. Reference topics: Cisco SD-WAN controller affinity, vSmart scale, control connections, TLOC control-plane optimization.
215. Frage
What is the purpose of a border node in a Cisco SD-Access fabric?
Antwort: D
Begründung:
The border node provides connectivity between the SD-Access fabric and networks outside the fabric. In Cisco SD-Access, edge nodes connect endpoints to the fabric, intermediate nodes transport routed IP traffic through the underlay, control-plane nodes maintain endpoint location mappings, and border nodes connect the fabric to external Layer 3 domains such as the data center, WAN, internet edge, or shared services network. A border node may perform proxy tunnel router functions and can de-encapsulate fabric traffic that is destined outside the overlay, but its design purpose is external connectivity for the fabric site. Network virtualization is primarily delivered through virtual networks, VRF separation, LISP control-plane mappings, and VXLAN encapsulation. Expanding the network is too vague and does not identify a Cisco SD-Access role. Therefore, among the available options, the border node is the component used to connect the fabric to the required external network resources. Reference topics: Cisco SD-Access border node, external connectivity, fabric roles, LISP proxy tunnel router, VN-to-VRF mapping.
216. Frage 
Refer to the exhibit. An architect is designing an ISIS network for a customer migrating from IPv4 to IPv6.
The current network uses narrow metrics, and the IPv6 areas will increase to 10 within the next two years.
Also, IPv6 traffic must not blackhole in IPv4 network during the migration. Which two solutions must the architect choose? (Choose two.)
Antwort: A,E
Begründung:
The design must enable IPv6 multi-topology behavior at the appropriate edge routers and move metric handling toward transition support where the current IS-IS network still uses narrow metrics. Multi-topology IS-IS is important during IPv4-to-IPv6 migration because IPv4 and IPv6 reachability do not always exist on identical links at every stage of the migration. If IPv6 follows the IPv4 topology when some devices or paths are not IPv6-ready, traffic can be blackholed. Multi-topology allows independent IPv4 and IPv6 SPF calculations, which prevents IPv6 traffic from being forwarded through IPv4-only portions of the network.
The metric-style transition setting is used when migrating from narrow to wide metrics, allowing interoperability while routers are upgraded and the design scales. Because the requirement says IPv6 areas will grow and the current network uses narrow metrics, the selected edge devices must support the IPv6 topology and metric transition behavior shown in the exhibit. Reference topics: IS-IS IPv6, multi-topology IS- IS, narrow metrics, wide metric transition, IPv6 migration, blackhole prevention.
217. Frage
A company uses cloud-based applications for voice and video calls, file sharing, content sharing, and messaging. During business hours, these applications randomly become slow and unresponsive. However, other applications work smoothly with the current applied QoS polices. Which solution must the company choose to resolve the issue?
Antwort: D
Begründung:
Explanation
using NBAR to identify application and bandwidth usage, then adjust existing QoS polices would be a more simple option. Of course, B is still ok if the network admin know all traffic and bandwidth consumption by other tools, say netflow.https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_nbar/configuration/15-mt/qos-nbar-15-mt-book/n
https://www.cisco.com/c/en/us/products/ios-nx-os-software/network-based-application-recognition-nbar/index.h
218. Frage
An engineer must use YANG with an XML representation to configure a Cisco IOS XE switch with these specifications:
* IP address 10.10.10.10/27 configured on the interface GigabitEthernet2/1/0
* connectivity from a directly connected host 10.10.10.1/27
Which YANG data model set must the engineer choose?
Antwort: D
219. Frage
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