Which DSCP class selector is necessary to mark scavenger traffic?

The correct answer is B. CS1. DSCP Class Selector 1 (CS1) is the specific marking used for scavenger or bulk traffic, indicating it should be the lowest priority and the first to be dropped during network congestion.

Media and QoS

Question

Options

AAF21
BCS1
CAF11
DCS2

How the community answered

(38 responses)

A
3% (1)
B
89% (34)
C
3% (1)
D
5% (2)

Why each option

DSCP Class Selector 1 (CS1) is the specific marking used for scavenger or bulk traffic, indicating it should be the lowest priority and the first to be dropped during network congestion.

AAF21

AF21 (Assured Forwarding Class 2, low drop probability) is used for business-critical but non-real-time data, indicating a higher priority than scavenger traffic.

BCS1Correct

CAF11

AF11 (Assured Forwarding Class 1, low drop probability) is used for business-critical but non-real-time data, implying a higher priority than scavenger traffic.

DCS2

CS2 (Class Selector 2) has a higher precedence than CS1 and is typically used for general low-priority data or network management traffic, not for scavenger traffic.

Concept tested: DSCP marking for scavenger traffic

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_diffserv/configuration/xe-16/qos-diffserv-xe-16-book/qos-diffserv-xe-16-book_chapter_011.html

Topics

#DSCP#QoS marking#Scavenger traffic#Class Selector

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