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350-501 · Question #190

Refer to the exhibit. An engineer needs to implement this QoS policy on customer's network due to ongoing slow network issues. What will be the effect on the network when the engineer implements…

The correct answer is D. Traffic that is identified in the ciscotest class map will be marked with IP precedence 1 when it. The QoS policy aims to identify traffic belonging to the ciscotest class map and then apply the action to set its IP Precedence value to 1.

Networking

Question

Refer to the exhibit. An engineer needs to implement this QoS policy on customer's network due to ongoing slow network issues. What will be the effect on the network when the engineer implements this configuration?

Exhibit

350-501 question #190 exhibit

Options

  • ATraffic that is identified in the ciscotest class map will be remarked from IP precedence 1 to DSCP
  • BTraffic that is identified in the ciscopolicy class map will be marked with IP precedence 1 when it
  • CTraffic that is identified in the ciscopolicy class map will be remarked from IP precedence 1 to
  • DTraffic that is identified in the ciscotest class map will be marked with IP precedence 1 when it

How the community answered

(48 responses)
  • A
    2% (1)
  • B
    4% (2)
  • C
    2% (1)
  • D
    92% (44)

Why each option

The QoS policy aims to identify traffic belonging to the `ciscotest` class map and then apply the action to set its IP Precedence value to 1.

ATraffic that is identified in the ciscotest class map will be remarked from IP precedence 1 to DSCP

This option incorrectly states that traffic will be 'remarked from IP precedence 1 to DSCP'; the correct action is to mark with IP precedence 1, not to remark from it or to DSCP.

BTraffic that is identified in the ciscopolicy class map will be marked with IP precedence 1 when it

This option misuses terminology by referring to `ciscopolicy` as a class map; `ciscopolicy` is the policy map that contains the class map and its actions.

CTraffic that is identified in the ciscopolicy class map will be remarked from IP precedence 1 to

This option also incorrectly refers to `ciscopolicy` as a class map and describes a 'remark' action, which is distinct from the marking action described in the correct answer.

DTraffic that is identified in the ciscotest class map will be marked with IP precedence 1 when itCorrect

This option correctly describes the action of marking traffic identified by the `ciscotest class map` with IP precedence 1. The `set ip precedence 1` command within a policy map applies this marking to matched traffic, helping to prioritize it.

Concept tested: QoS traffic classification and marking (IP Precedence)

Source: https://www.cisco.com/c/en/us/td/docs/ios/qos/configuration/guide/12_2sr/qos_12_2sr_book/config_qos_pol_feat.html

Topics

#QoS#Traffic Marking#IP Precedence#Class Maps

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