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Free Online Flashcard Deck

5 NTP and Quality of Service Free Online FlashCards

Study 5 NTP and Quality of Service with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.

12 cards
01
Front

What does NTP synchronize?

Back

NTP synchronizes device clocks with reference time sources.

02
Front

Does NTP configure a device’s time zone?

Back

NTP adjusts the system clock, but it does not set the device’s time zone. Configure the time zone separately.

03
Front

Which commands check NTP synchronization and server selection?

Back

Use `show ntp status` and `show ntp associations` to check synchronization and the selected server.

04
Front

What should you check when NTP synchronization fails?

Back

Check server reachability, UDP port 123 access, routing, and whether the server has a valid time source.

05
Front

What does QoS do—and what does it not do?

Back

QoS manages traffic when a link is congested; it does not create additional bandwidth.

06
Front

What is the first step in a basic QoS workflow?

Back

Classify packets using a characteristic such as DSCP, an access-control list, or an application.

07
Front

Where should QoS markings be applied and trusted?

Back

Apply markings at a trusted network edge; do not blindly trust markings from untrusted devices.

08
Front

Where should QoS queue and schedule traffic?

Back

Queue and schedule traffic at the congested output interface so selected classes receive their intended treatment.

09
Front

What traffic commonly uses EF (DSCP 46)?

Back

EF (DSCP 46) is commonly used for delay-sensitive voice traffic and should be reserved for authorized traffic.

10
Front

Should NTP traffic automatically receive QoS priority?

Back

NTP traffic does not automatically need priority; guidance distinguishes high-accuracy timing within a managed network from ordinary wall-clock synchronization.

11
Front

Where should the example voice QoS policy be applied?

Back

Apply the voice policy on the outbound interface where congestion is expected.

12
Front

Which UDP port does NTP use?

Back

NTP uses UDP port 123.