- A
In a policy-map, the class class-default is optional
Why wrong: Incorrect; class-default is mandatory for unmatched traffic.
- B
MQC uses a three-step process: define class-map, policy-map, and apply service-policy
Correct; that is the MQC process.
- C
The service-policy command applies the policy to an interface
Correct; service-policy applies the policy.
- D
A class-map can match on DSCP, IP precedence, or ACL
Correct; class-map can match various fields.
- E
A policy-map can contain only one class
Why wrong: Incorrect; policy-map can have multiple classes.
Question 395 of 1,000
350-501 Automation and Quality of Services Practice Question
This 350-501 practice question tests your understanding of automation and quality of services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An SP is designing MQC policies. Which THREE statements about MQC are true? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
MQC uses a three-step process: define class-map, policy-map, and apply service-policy
MQC uses class-map, policy-map, and service-policy; class-map can match multiple criteria; policy-map defines actions.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
In a policy-map, the class class-default is optional
Why it's wrong here
Incorrect; class-default is mandatory for unmatched traffic.
- ✓
MQC uses a three-step process: define class-map, policy-map, and apply service-policy
Why this is correct
Correct; that is the MQC process.
Related concept
Standard ACLs match source addresses.
- ✓
The service-policy command applies the policy to an interface
Why this is correct
Correct; service-policy applies the policy.
Related concept
Standard ACLs match source addresses.
- ✓
A class-map can match on DSCP, IP precedence, or ACL
Why this is correct
Correct; class-map can match various fields.
Related concept
Standard ACLs match source addresses.
- ✗
A policy-map can contain only one class
Why it's wrong here
Incorrect; policy-map can have multiple classes.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 350-501 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this 350-501 question test?
Automation and Quality of Services — This question tests Automation and Quality of Services — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: MQC uses a three-step process: define class-map, policy-map, and apply service-policy — MQC uses class-map, policy-map, and service-policy; class-map can match multiple criteria; policy-map defines actions.
What should I do if I get this 350-501 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 350-501 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.
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