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Exam 1z0-820 topic 1 question 56 discussion

Actual exam question from Oracle's 1z0-820
Question #: 56
Topic #: 1
[All 1z0-820 Questions]

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

  • A. No value is listed for virtual network interfaces.
  • B. A value of 0 is listed for virtual interfaces and ether stubs.
  • C. The number of Interrupts is listed, which indicates network efficiency.
  • D. A number equal to the number of transmitted Ethernet frames is listed for physical links.
  • E. The number of packets that were interrupted by a collision is listed, which may indicate hardware problems.
Show Suggested Answer Hide Answer
Suggested Answer: CE 🗳️
In this output, the statistics for interrupt (INTRS) are significant. Low interrupt numbers indicate greater efficiency in performance. If the interrupt numbers are high, then you might need to add more resources to the specific link.
Example:
# dlstat -r -i 1
LINK IPKTS RBYTES INTRS POLLS CH<10 CH10-50 CH>50 e1000g0 101.91K 32.86M 87.56K 14.35K 3.70K 205 5 nxge1 9.61M 14.47G 5.79M 3.82M 379.98K 85.66K 1.64K vnic1 8 336 0 0 0 0 0 e1000g0 0 0 0 0 0 0 0 nxge1 82.13K 123.69M 50.00K 32.13K 3.17K 724 24 vnic1 0 0 0 0 0 0 0
...
Note: dlstat show-link [-r [-F] | -t] [-i interval] [-a] [-p] [ -o field[,...]] [-u R|K|M|G|T|P] [link]
Display statistics for a link.
Note: dlstat show-link [-r [-F] | -t] [-i interval] [-a] [-p] [ -o field[,...]] [-u R|K|M|G|T|P] [link]
Display statistics for a link.
-r
Display receive-side statistics only. Includes bytes and packets received, hardware and software drops, and so forth.
List of supported RX fields:
link
iusedby
ibytes
ipkts
intrs
polls
hdrops: hardware drops
sdrops: software drops (owing to bandwidth enforcement)
ch<10: number of packet chains of length < 10
ch10-50: number of packet chains of length between 10 and 50
ch>50: number of packet chains of length > 50
Incorrect answers:
Not A, not B: Example:

Display rx side statistics -
# dlstat -r
LINK IPKTS IBYTES INTRS POLLS HDRPS SDRPS CH<10 CH10-50 CH>50 UTIL e1000g0 21.2K 2.1M 22.3K 78.0 0.0 0.0 57.0 0.0 0.0 0.0% nxge0 24.5M 13.6G 0.8K 10.7M 0.0 0.0 0.3M 2.96M 32.5K 0.0% vnic1 24.5M 13.6G 0.8K 10.7M 0.0 0.0 0.3M 2.96M 32.5K 0.0%
Reference: man dlstat
by tranquangdodo at April 4, 2025, 12:07 p.m.

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