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200-155 · Question #41

The ARC is responsible for which two processes? (Choose two )

The correct answer is A. network policy configuration D. ISL blocking per STP implementation. A network control plane or orchestrator, referred to as the ARC, is responsible for defining comprehensive network policies and managing the operational states of inter-switch links.

Network Virtualization

Question

The ARC is responsible for which two processes? (Choose two )

Options

  • Anetwork policy configuration
  • Bfabric segmentation
  • CBGP end-node emulation
  • DISL blocking per STP implementation
  • Eswitch firmware management

How the community answered

(67 responses)
  • A
    88% (59)
  • B
    3% (2)
  • C
    1% (1)
  • E
    7% (5)

Why each option

A network control plane or orchestrator, referred to as the ARC, is responsible for defining comprehensive network policies and managing the operational states of inter-switch links.

Anetwork policy configurationCorrect

The ARC, as a central control plane component, is fundamentally responsible for defining, distributing, and enforcing network policies across the fabric, which encompasses connectivity, security, and traffic forwarding rules.

Bfabric segmentation

Fabric segmentation, such as defining VRFs and Bridge Domains, is an outcome and application of network policy configuration, which is a primary responsibility of the ARC, rather than a distinct, isolated process.

CBGP end-node emulation

A network control plane like the ARC (e.g., Cisco APIC) integrates with external BGP routers for route exchange but does not 'emulate' BGP end-nodes for internal fabric devices or connected servers.

DISL blocking per STP implementationCorrect

The ARC plays a critical role in managing Inter-Switch Links (ISLs) and ensuring a loop-free topology by implementing or integrating with mechanisms that logically block paths where necessary, analogous to STP, particularly for maintaining fabric integrity or during integration with external Layer 2 domains.

Eswitch firmware management

While firmware management is an important operational task often handled by a central controller, it is distinct from the core responsibilities of network policy configuration and active link state management.

Concept tested: Network control plane responsibilities (policy, link management)

Topics

#ARC functions#network policy#STP

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