hardMultiple SelectObjective-mapped
IPv4 ACL Sequence Numbers
Which THREE statements about IPv4 access control list sequence numbers are true? (Choose THREE.)
Quick Answer
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.
⚠ Common exam trap
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.
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
✓
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.
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.
- ✗
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.
- ✓
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.
- ✗
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.
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Same concept, more angles
1 more way this is tested on 300-410
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: 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.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.