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101 · Question #122

What are two advantages of the Quality of Service (QoS) load balancing method? (Choose two.)

The correct answer is B. It combines multiple load balancing metric values in a single load balancing method. C. It allows the GTM administrator to place relative values on each metric used to determine the. The GTM QoS load balancing method is advantageous because it aggregates multiple performance metrics into one score and lets administrators assign relative weights to each metric.

Section 3: Load Balancing and High Availability Basics

Question

What are two advantages of the Quality of Service (QoS) load balancing method? (Choose two.)

Options

  • AIt resolves requests to the site with the highest QoS value in the IP header.
  • BIt combines multiple load balancing metric values in a single load balancing method.
  • CIt allows the GTM administrator to place relative values on each metric used to determine the
  • DIt allows the GTM System to select the optimum virtual server based on all available path and

How the community answered

(50 responses)
  • A
    4% (2)
  • B
    86% (43)
  • D
    10% (5)

Why each option

The GTM QoS load balancing method is advantageous because it aggregates multiple performance metrics into one score and lets administrators assign relative weights to each metric.

AIt resolves requests to the site with the highest QoS value in the IP header.

QoS load balancing does not resolve requests based on the QoS/DSCP value found in IP packet headers; it calculates a weighted score from collected path and server metrics, which is unrelated to the IP header TOS/DSCP field.

BIt combines multiple load balancing metric values in a single load balancing method.Correct

QoS load balancing combines multiple individual metrics - such as round-trip time, packet rate, and completion rate - into a single composite score per virtual server, making it a multi-dimensional method rather than a single-factor one.

CIt allows the GTM administrator to place relative values on each metric used to determine theCorrect

Administrators can assign a relative numeric weight to each metric included in the QoS calculation, enabling them to emphasize the metrics most relevant to their environment when determining which virtual server to select.

DIt allows the GTM System to select the optimum virtual server based on all available path and

Selecting a virtual server based on all available path and server data is more characteristic of methods like Global Availability or dynamic ratio, not a specific feature unique to QoS load balancing.

Concept tested: GTM QoS weighted multi-metric load balancing method

Source: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-dns-implementations/big-ip-dns-implementations/overview-load-balancing-methods.html

Topics

#QoS load balancing#load balancing methods#metric weighting#GTM

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