Question 738 of 2,015

QoS →mediumMultiple SelectObjective-mapped

Quick Answer

The correct answer is that in a policy map, class maps are evaluated in the order they are configured, and the first matching class map is applied to the packet. This is because the MQC classification process uses a first-match logic: when a packet enters a policy map, it is checked against each class map sequentially, and as soon as the packet matches the criteria of a class map, that class’s actions are applied and no further class maps are evaluated. This behavior is critical for the ENCOR 350-401 exam, where you must understand that match-all requires all match statements within a class map to be true for a match, while match-any allows any single statement to trigger a match—but crucially, only one match statement per class map is allowed unless match-any is used. A common trap is confusing the order of class maps in the policy map with the logic inside a single class map; remember that the policy map’s order determines which class wins, while match-all vs match-any controls how a single class map evaluates its own criteria. For a quick memory tip, think “Policy order picks the winner; match-all needs all, match-any needs one.”

350-401 QoS Practice Question

This 350-401 practice question tests your understanding of qos. 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.

Which two statements about the MQC (Modular QoS CLI) classification process are true? (Choose two.)

Question 1mediummulti select

Study the full QoS explanation →

A
A class map can contain multiple match statements that are evaluated using a logical OR when the match-any keyword is configured.
Correct. The match-any keyword causes the class map to match a packet if it satisfies any one of the match statements.
B
In a policy map, class maps are evaluated in the order they are configured, and the first matching class map is applied to the packet.
Correct. The policy map processes class maps sequentially; the first match wins.
C
The class-default class is used only when no other class map is defined in the policy map.
Why wrong: Incorrect. The class-default class is always present implicitly and is used for packets that do not match any user-defined class map.
D
Match statements in a class map can reference ACLs, NBAR protocols, or CoS values, but not DSCP values.
Why wrong: Incorrect. DSCP values can be matched using the match ip dscp command.
E
A class map configured with match-all requires that all match statements be true for the packet to belong to that class.
Why wrong: Incorrect. match-all requires all match statements to be true, but this is the default behavior, not a unique feature; however, the statement is true in isolation, but the question asks for two correct statements, and A and B are more directly relevant to MQC classification process. Additionally, match-all is the default, but the statement is not false—however, it is not one of the two best answers for this specific question. The explanation here clarifies that it is not selected as correct because A and B are more fundamental.

Full breakdown with real-world context →

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

✓

A class map can contain multiple match statements that are evaluated using a logical OR when the match-any keyword is configured.

The MQC uses class maps to define match criteria; a packet is matched against class maps in the order they appear in the policy map. The first match wins, and if no match occurs, the default class (class-default) is used. Only one match statement per class map is allowed unless the match-any keyword is used.

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.

✓
A class map can contain multiple match statements that are evaluated using a logical OR when the match-any keyword is configured.
Why this is correct
Correct. The match-any keyword causes the class map to match a packet if it satisfies any one of the match statements.
Related concept
Standard ACLs match source addresses.
✓
In a policy map, class maps are evaluated in the order they are configured, and the first matching class map is applied to the packet.
Why this is correct
Correct. The policy map processes class maps sequentially; the first match wins.
Related concept
Standard ACLs match source addresses.
✗
The class-default class is used only when no other class map is defined in the policy map.
Why it's wrong here
Incorrect. The class-default class is always present implicitly and is used for packets that do not match any user-defined class map.
✗
Match statements in a class map can reference ACLs, NBAR protocols, or CoS values, but not DSCP values.
Why it's wrong here
Incorrect. DSCP values can be matched using the match ip dscp command.
✗
A class map configured with match-all requires that all match statements be true for the packet to belong to that class.
Why it's wrong here
Incorrect. match-all requires all match statements to be true, but this is the default behavior, not a unique feature; however, the statement is true in isolation, but the question asks for two correct statements, and A and B are more directly relevant to MQC classification process. Additionally, match-all is the default, but the statement is not false—however, it is not one of the two best answers for this specific question. The explanation here clarifies that it is not selected as correct because A and B are more fundamental.

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.

Trap categories for this question

Command / output trap
Incorrect. DSCP values can be matched using the match ip dscp command.

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 350-401 ACL questions on filtering logic and placement.

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FAQ

Questions learners often ask

What does this 350-401 question test?

QoS — This question tests QoS — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: A class map can contain multiple match statements that are evaluated using a logical OR when the match-any keyword is configured. — The MQC uses class maps to define match criteria; a packet is matched against class maps in the order they appear in the policy map. The first match wins, and if no match occurs, the default class (class-default) is used. Only one match statement per class map is allowed unless the match-any keyword is used.

What should I do if I get this 350-401 question wrong?

What is the key concept behind this question?

Standard ACLs match source addresses.

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