N10-009 Domain 1: Networking Concepts

Which QoS mechanism marks packets for priority treatment?

Multiple choice — select one answer

Answer choices

  1. a. Bus (legacy Ethernet coax)
  2. b. Well-known ports in TCP/UDP (e.g., 80 HTTP)
  3. c. DSCP
  4. d. 802.11ax era security updates include WPA3

Architectural breakdown & explanation

Differentiated Services Code Point marks traffic classes.

Correct answer(s): c. DSCP

Exam domain: Domain 1: Networking Concepts (24% weight on the official guide).

Official documentation & study links

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