Cisco Designing and Implementing Cisco Service Provider Cloud Network Infrastructure v1.0 300-540 SPCNI Exam Questions

Answer : C

Comprehensive and Detailed Explanation From Cisco NSO Orchestration Knowledge

In Cisco NSO deployments:

ncs-setup is only used once, during initial NSO instance creation.

ls -l nso-instance/packages/ simply lists packages --- not used to start NSO.

ncs -status checks status but does not run NSO.

To actually start the NSO service so that device packages (including ASAv service packages) can be loaded and orchestration can begin, the correct command is:

ncs

This launches the NSO runtime and loads all configured packages, enabling the SaaS ASAv service.

Answer : A

Comprehensive and Detailed Explanation From Cisco NFVI Knowledge

Cisco IOS Flexible NetFlow is the primary telemetry and flow-collection mechanism used across Cisco NFVI platforms. One of its powerful information-gathering capabilities is the ability to create multiple, separate flow caches, each one with:

Its own key fields

Its own record type

Its own export destination

This allows NFVI deployments to capture different types of traffic visibility (control plane, data plane, management, or tenant-specific flows) with independent caches, which improves scalability and granularity.

Why the other options are incorrect:

Docker and Kubernetes (B, D) are container orchestration tools, unrelated to NetFlow flow-gathering capabilities.

Single cache (C) is traditional NetFlow, not Flexible NetFlow. Flexible NetFlow explicitly supports multiple independent caches.

Answer : A

Cisco Umbrella DNS-layer security:

Blocks malicious domains used in phishing, malware, C2 communications, and ransomware

Stops threats before connections are made

Uses DNS-based filtering and threat intelligence

It does not mitigate:

DDoS (needs scrubbing centers)

Brute force login attempts

Zero-day exploits directly

Thus, A is correct.

Answer : B

Comprehensive and Detailed Explanation

Cisco Container Platform (CCP), built on Kubernetes orchestration, uses YAML files for:

Cluster configuration

Pod definitions

Network settings

Storage mappings

YAML is the industry-standard declarative syntax for Kubernetes and container orchestration platforms.

HTML, XHTML, and XML are not used for CCP configuration.

Answer : C

Comprehensive and Detailed Explanation Based on Designing and Implementing Cisco Service Provider Cloud Network Infrastructure Knowledge

When connecting carrier-neutral facilities (CNFs) or data centers within the same metropolitan area, service providers typically use high-bandwidth, low-latency optical transport methods. The most appropriate and commonly deployed interconnection technology is:

DWDM (Dense Wavelength Division Multiplexing) ring, which provides:

High capacity (10G, 40G, 100G, 400G)

Low latency

Redundancy through ring or mesh topologies

Multi-wavelength multiplexing for cost efficiency

Carrier-grade reliability for metro interconnect services

This aligns with cloud interconnect and metro transport design used in service provider environments.

Evaluation of the Options

A . OSPF backbone area adjacency

This is a routing protocol adjacency, not a physical connection method. It requires a transport link underneath but does not represent the physical interconnect itself.

B . Private wireless connection

Not suitable for CNF or metro DC interconnect because it lacks the bandwidth, reliability, and deterministic performance required for large-scale carrier-grade interconnects.

C . DWDM ring

This is the correct method. DWDM-based metro fiber rings are the standard for connecting carrier-neutral facilities in the same metro region.

D . CAT6e connection

This is limited to short-distance copper Ethernet (tens of meters). It is not used for metro-scale interconnects or between CNFs.

Answer : C

Comprehensive and Detailed Explanation

An API logic flaw is a weakness in the API's business logic --- not in encryption or transport security. It occurs when:

API functions are misused

Business rules are bypassed

Security validation is missing

Workflow logic is incorrect

These issues cannot be solved through encryption (at rest or in transit). They require:

Vulnerability remediation

Fixing API code logic

Updating API validation, flow control, and authentication logic

Thus the correct answer is C. Remediation of vulnerabilities.

Answer :

In Cisco SD-WAN, vSmart controllers must be assigned to controller groups so that edge routers can form redundant control-plane connections. Each data center in the diagram has its own group:

New York DC Controller group-ID 1 (vSmart1, vSmart2, vSmart3)

Los Angeles DC Controller group-ID 2 (vSmart4, vSmart5, vSmart6)

To configure the controllers correctly:

vSmart1

It resides in the New York DC, so it must be assigned to controller-group 1. Required command: system controller-group-id 1 This corresponds to Option D.

vSmart4

It resides in the Los Angeles DC, so it must be assigned to controller-group 2. Required command: system controller-group-id 2 This corresponds to Option C.

Why Other Options Are Incorrect

A and B: The command max-control-connections is configured on edge routers, not vSmart controllers.

E: Controller-group-id 4 does not exist in this design; only group 1 and group 2 are shown.