The answer is that the ip access-list resequence command can renumber ACL entries, which is one of three true statements about IPv4 ACL sequence numbers. This is correct because sequence numbers are embedded in every IPv4 ACL entry, allowing administrators to insert new rules between existing ones by specifying a sequence number that falls between two current numbers, thereby controlling the order of evaluation without deleting and re-entering the entire list. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your ability to manage ACLs efficiently in production networks, where reordering is common; a frequent trap is assuming sequence numbers are optional or that they cannot be modified after creation. Remember the mnemonic "RINSE" — Resequence, Insert, Number, Sequence, Edit — to recall that resequencing is the key command for renumbering, and that every entry must have a unique sequence number for insertion to work.
300-410 IPv4 Access Control Lists Practice Question
This 300-410 practice question tests your understanding of ipv4 access control lists. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 THREE statements about IPv4 access control list sequence numbers are true? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Sequence numbers allow insertion of new entries between existing ones.
Sequence numbers in IPv4 ACLs allow administrators to insert new entries between existing ones without deleting and re-entering the entire ACL. This is because each entry is assigned a unique sequence number, and new entries can be added with a sequence number that falls between two existing numbers, enabling granular control over the order of evaluation.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Sequence numbers allow insertion of new entries between existing ones.
Why this is correct
You can specify a sequence number to place an entry at a specific position in the ACL.
Related concept
Read the scenario before looking for a memorised answer.
✗
Sequence numbers are automatically assigned in increments of 10 for numbered ACLs.
Why it's wrong here
For numbered ACLs using the old-style 'access-list' command, entries are appended without sequence numbers.
✓
Named ACLs support sequence numbers.
Why this is correct
Named ACLs use sequence numbers by default, allowing easy editing.
Related concept
Read the scenario before looking for a memorised answer.
✓
The ip access-list resequence command can renumber ACL entries.
Why this is correct
This command allows you to renumber the sequence numbers of an ACL.
Related concept
Read the scenario before looking for a memorised answer.
✗
Resequencing an ACL changes the order of evaluation.
Why it's wrong here
Resequencing only changes the sequence numbers, not the order of entries in the ACL.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that resequencing an ACL changes the order of evaluation, but in reality, it only renumbers the entries while preserving their original sequence; the trap is confusing sequence number reassignment with rule reordering.
Trap categories for this question
Command / output trap
For numbered ACLs using the old-style 'access-list' command, entries are appended without sequence numbers.
Detailed technical explanation
How to think about this question
Under the hood, ACL sequence numbers are stored as 32-bit integers, and the 'ip access-list resequence' command uses a starting sequence number and an increment value (default 10) to reassign numbers without altering the logical order. In real-world scenarios, resequencing is critical when an ACL has many entries and you need to insert a new rule in the middle; without resequencing, you might run out of sequence number gaps (e.g., after many insertions), forcing a full rewrite.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
IPv4 Access Control Lists — This question tests IPv4 Access Control Lists — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Sequence numbers allow insertion of new entries between existing ones. — Sequence numbers in IPv4 ACLs allow administrators to insert new entries between existing ones without deleting and re-entering the entire ACL. This is because each entry is assigned a unique sequence number, and new entries can be added with a sequence number that falls between two existing numbers, enabling granular control over the order of evaluation.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO statements about the 'ip access-list resequence' command are true? (Choose TWO.)
hard
A.The 'ip access-list resequence' command can be applied to both numbered and named ACLs.
✓ B.The default starting sequence number for the resequence command is 10, and the default increment is 10.
C.The resequence command changes the order in which ACL entries are evaluated.
✓ D.The resequence command is useful when you need to insert a new ACE between two existing entries with consecutive sequence numbers.
E.The resequence command can only be used on extended named ACLs, not standard named ACLs.
Why B: Option B is correct because the default starting sequence number for the 'ip access-list resequence' command is 10, and the default increment is also 10. This allows you to renumber the Access Control Entries (ACEs) within an ACL so that you can later insert new entries between existing ones without having to remove and re-add the entire list.
Last reviewed: Jun 24, 2026
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