When an engineer is optimizing the network, in order to prevent non-critical services from occupying too much network resources, he configures the QoS function based on the application protocol. The…

Question

Options

• AAll apps in the specified app list discard FaceTime messages
• BSkypeForBusiness's DSCP priority is 40
• CYou can view user-based protocol statistics
• DYou can view protocol statistics based on VAP

• A
  8% (3)
• B
  3% (1)
• C
  5% (2)
• D
  85% (33)

Explanation

Option D is incorrect because in an application protocol-based QoS configuration, protocol statistics can be viewed per user, not per VAP (Virtual Access Point). VAP is a wireless networking concept tied to SSID instances on an access point, and protocol-level traffic analysis in this QoS context operates at the user/flow level - not at the VAP level, which is a Layer 2 wireless boundary.

Why the distractors are correct (and thus not the answer):

• A is correct: Configuring an app list with a "discard" action for FaceTime is a valid and standard QoS behavior - dropping traffic from unwanted or non-critical apps is a core use case.
• B is correct: DSCP value 40 is a valid setting (it falls within the 0–63 range and corresponds to CS5, commonly used for video/real-time traffic like Skype for Business).
• C is correct: User-based protocol statistics are a supported view in application-aware QoS systems, allowing engineers to audit per-user bandwidth consumption by protocol.

Memory tip: Remember "VAP = Wireless, not Protocol Stats." VAP belongs to the WLAN/wireless domain - if a question mixes VAP with application-layer QoS reporting, that pairing is almost always the wrong statement. Associate protocol statistics with users, not access points.

No community discussion yet for this question.