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1Z0-820 · Question #58

You run the command dlstat show-link -r. Select the two correct statements regarding the information displayed in the INTRS column.

The correct answer is C. The number of Interrupts is listed, which indicates network efficiency. E. The number of packets that were interrupted by a collision is listed, which may indicate hardware problems. C is correct because the INTRS column in dlstat show-link -r output does display the count of hardware interrupts processed by the network interface driver - a higher interrupt rate can signal inefficient interrupt coalescing or a busy interface, making it a relevant indicator…

Configuring and Administering Networks

Question

You run the command dlstat show-link -r. Select the two correct statements regarding the information displayed in the INTRS column.

Options

  • ANo value is listed for virtual network interfaces.
  • BA value of 0 is listed for virtual interfaces and ether stubs.
  • CThe number of Interrupts is listed, which indicates network efficiency.
  • DA number equal to the number of transmitted Ethernet frames is listed for physical links.
  • EThe number of packets that were interrupted by a collision is listed, which may indicate hardware problems.

How the community answered

(31 responses)
  • A
    3% (1)
  • B
    3% (1)
  • C
    81% (25)
  • D
    13% (4)

Explanation

C is correct because the INTRS column in dlstat show-link -r output does display the count of hardware interrupts processed by the network interface driver - a higher interrupt rate can signal inefficient interrupt coalescing or a busy interface, making it a relevant indicator of network efficiency. E is correct because collision-based interrupts on half-duplex or legacy Ethernet links appear in this count, and an unexpectedly high collision interrupt rate can point to hardware or cabling problems.

Why the distractors fail:

  • A is wrong because virtual interfaces (VNICs, etc.) do appear in the output - they just show a value of 0, not a blank.
  • B is wrong because it incorrectly groups "ether stubs" with virtual interfaces; ether stubs are placeholder objects and behave differently than VNICs.
  • D is wrong because INTRS counts interrupts, not transmitted frames - those are tracked in separate TX counters.

Memory tip: Think of INTRS as the NIC "ringing the doorbell" to the CPU. Physical hardware rings it for real work (and collisions), so it tells you about efficiency and health - virtual devices have no doorbell to ring, so they show 0.

Topics

#network diagnostics#dlstat command#interrupt statistics#hardware troubleshooting

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