nerdexam
Cisco

200-155 · Question #191

Which description of the function of a Cisco APIC is true?

The correct answer is B. The APIC exposes a north bound API by using XML and JSON.. The Cisco APIC serves as the central management and policy controller for ACI, exposing a programmatic interface for automation and orchestration.

Network Virtualization

Question

Which description of the function of a Cisco APIC is true?

Options

  • AThe APIC discovers only the leaf switch to which it directly connects
  • BThe APIC exposes a north bound API by using XML and JSON.
  • CThe infrastructure VLAND ID of the ACI fabric is used to communicate between the controller and
  • DWhen communication to the APIC is down, the Cisco ACI fabric fails to forward traffic.

How the community answered

(32 responses)
  • A
    3% (1)
  • B
    88% (28)
  • C
    3% (1)
  • D
    6% (2)

Why each option

The Cisco APIC serves as the central management and policy controller for ACI, exposing a programmatic interface for automation and orchestration.

AThe APIC discovers only the leaf switch to which it directly connects

The APIC discovers all leaf and spine switches in the ACI fabric, not just those to which it is directly connected, using protocols like LLDP for fabric discovery.

BThe APIC exposes a north bound API by using XML and JSON.Correct

The Cisco APIC provides a robust northbound API, primarily using XML and JSON, allowing for programmatic configuration, monitoring, and integration with external orchestration systems and automation tools. This API is a cornerstone of ACI's policy-driven automation capabilities.

CThe infrastructure VLAND ID of the ACI fabric is used to communicate between the controller and

While the infrastructure VLAN is part of the ACI fabric's internal communication, stating it is used for communication "between the controller and" is an incomplete or potentially misleading description of the APIC's core function.

DWhen communication to the APIC is down, the Cisco ACI fabric fails to forward traffic.

The Cisco ACI fabric is designed for data plane resiliency; even if communication to the APIC cluster is lost, the switches continue to forward traffic based on the last known policies and forwarding entries.

Concept tested: Cisco ACI APIC functions and northbound API

Source: https://www.cisco.com/c/en/us/products/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739462.html

Topics

#Cisco APIC#northbound API#ACI fabric communication#XML/JSON API

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full 200-155 Practice