Which statement is true?

Question

Options

• AThe L4TM allow list overrides the block list.
• BThe overlap of the L4TM allow list and block list is the L4TM grey list
• CThe L4TM block lists override the allow lists.
• DL4TM allow list and block list overlaps are not permitted.

• A
  90% (52)
• B
  5% (3)
• C
  3% (2)
• D
  2% (1)

Explanation

Option A is correct because L4TM (Layer 4 Traffic Management) is designed so that explicitly permitted traffic on the allow list takes precedence - if an entry appears on both lists, the allow list wins and the traffic is permitted. This design ensures that intentional exceptions to blocking rules are always honored.

Option B is wrong because there is no concept of a "grey list" in L4TM; overlapping entries don't create a third category - the conflict is resolved by the allow list winning.

Option C is wrong because it states the opposite of actual behavior; block lists do not override allow lists in L4TM - allow lists have higher priority.

Option D is wrong because overlaps between the two lists are entirely permitted; the system simply has a defined rule (allow wins) for resolving them rather than prohibiting the overlap.

Memory tip: Think of an allowlist as a VIP pass - it overrides the general "no entry" block list. In L4TM, Allow = Above the block list in priority.

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