Which of the following descriptions about MQc flow classification are correct? (Multiple choice)

Question

Options

• AThe relationship between the rules in the set is "AND", when the traffic classification contains ACL rules, the packet must match one of the ACL rules and all other matching conditions at the same time
• BThe relationship between the rules in the traffic classification is "or" by default
• CWhen the traffic classification only contains ACL rules, when there are no ACL rule in the traffic classification, the packet must match all non-ACL rules
• DSetting rules can set "and" and "or" at the same time

• A
  79% (38)
• C
  15% (7)
• D
  6% (3)

Explanation

Options A and B are correct because they accurately describe the dual-logic behavior of MQc traffic classifiers. By default (B), multiple rules within a classifier use an OR relationship - a packet only needs to match any one rule to be classified. However, when ACL rules are mixed with other rule types (A), a special combined logic applies: the packet must match at least one ACL entry AND simultaneously satisfy all non-ACL conditions - this is the "AND" relationship that activates specifically in mixed-rule scenarios.

Option C is wrong because it is self-contradictory - it states the classifier "only contains ACL rules" and then references "no ACL rules" in the same sentence. The logic described doesn't reflect actual MQc behavior; when only non-ACL rules exist, the default OR relationship (from B) still applies.

Option D is wrong because MQc does not allow you to configure AND and OR simultaneously within a single traffic classifier. You can change the default from OR to AND, but these are mutually exclusive settings - only one logical operator governs the rule set at a time.

Memory tip: Think of MQc's default as an airport security line - you only need to pass one checkpoint (OR). But if ACLs are in the mix, they form a "VIP gate": you must clear the ACL check plus every other requirement (AND). And you can't have both gates running at once (no mixing AND/OR).

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