Palo Alto Networks Certified Network Security Engineer (PCNSE)Deploy and ConfigureMedium
A network architect is designing a new data center and needs to ensure that critical applications receive preferential bandwidth during periods of congestion. Which QoS configuration element directly applies prioritization to specific traffic types?
- AQoS Policy Rule
- BDSCP Marking Profile
- CInterface QoS Profile
- DTraffic Shaping Profile
Show answer & explanationAnswer & explanation
Correct answer: A. QoS Policy Rule
A QoS Policy Rule on a Palo Alto Networks firewall is used to classify and mark traffic based on various criteria (application, user, zone, etc.) and then assign a QoS class or DSCP value, which is then acted upon by an Interface QoS Profile.
Why the other options are wrong
- B. DSCP Marking Profiles are a component used within QoS Policy Rules to assign DSCP values, not the rule itself.
- C. Interface QoS Profiles apply bandwidth management and queuing based on QoS classes, but don't classify the traffic itself.
- D. Traffic Shaping Profiles limit bandwidth for specific traffic, rather than prioritize.
QoS Policy Rule
A QoS Policy Rule on a Palo Alto Networks firewall classifies traffic based on defined criteria and assigns it a specific QoS class or DSCP value, which is then used by interface QoS profiles for prioritization and bandwidth management.
- Classifies traffic based on various attributes.
- Assigns a QoS class or DSCP value.
- Works in conjunction with Interface QoS Profiles.
Memory trick: The 'Quality of Service Policy Rule' is the traffic cop deciding who goes first.