Quick Answer
The answer is 1-99 and 1300-1999. Standard IPv4 ACLs use these number ranges because Cisco reserves them exclusively for filtering traffic based solely on the source IP address, without examining destination or port information. The original range 1-99 was later expanded to include 1300-1999 to provide additional identifiers, preventing overlap with extended ACL ranges that use 100-199 and 2000-2699. On the Cisco CCNP ENARSI 300-410 exam, this distinction tests your ability to quickly identify ACL types from their numbers, often appearing in configuration scenarios where misapplying a number could cause unintended filtering. A common trap is confusing the standard expanded range 1300-1999 with the extended expanded range 2000-2699, so remember that standard ACLs always stay below 2000. For a quick memory tip: think "standard starts at 1 and stays small" — the original range is 1-99, and the expanded range mirrors the first two digits (13-19) followed by 00-99.
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.
In a standard IPv4 ACL, what is the range of valid numbers for the access-list number?
1-99 and 1300-1999
Correct. These are the standard ACL number ranges.
100-199 and 2000-2699
Why wrong: Incorrect. These are the extended ACL number ranges.
1-99 only
Why wrong: Incorrect. The expanded range 1300-1999 is also valid for standard ACLs.
1-199
Why wrong: Incorrect. Numbers 100-199 are for extended ACLs.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
1-99 and 1300-1999
Standard IPv4 ACLs use access-list numbers 1-99 and 1300-1999 to filter traffic based solely on source IP address. The expanded range 1300-1999 was introduced to provide additional standard ACL identifiers beyond the original 1-99, allowing more granular control without overlapping with extended ACL ranges.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
1-99 and 1300-1999
Why this is correct
Correct. These are the standard ACL number ranges.
Related concept
Read the scenario before looking for a memorised answer.
100-199 and 2000-2699
Why it's wrong here
Incorrect. These are the extended ACL number ranges.
1-99 only
Why it's wrong here
Incorrect. The expanded range 1300-1999 is also valid for standard ACLs.
1-199
Why it's wrong here
Incorrect. Numbers 100-199 are for extended ACLs.
Common exam traps
Cisco often tests the expanded standard ACL range (1300-1999) to catch candidates who only memorize the original 1-99 range, assuming standard ACLs are limited to that smaller set.
Detailed technical explanation
Standard ACLs are identified by a number from 1-99 or 1300-1999, as defined in RFC 1700 and Cisco IOS implementation. The expanded range (1300-1999) was added to allow more standard ACLs without conflicting with extended ACL ranges (100-199, 2000-2699). In practice, a network engineer might use standard ACLs near the edge of a network to permit or deny traffic from specific source subnets, but they cannot filter on destination or port, making them less granular than extended ACLs.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
IPv4 Access Control Lists — This question tests IPv4 Access Control Lists — Read the scenario before looking for a memorised answer..
The correct answer is: 1-99 and 1300-1999 — Standard IPv4 ACLs use access-list numbers 1-99 and 1300-1999 to filter traffic based solely on source IP address. The expanded range 1300-1999 was introduced to provide additional standard ACL identifiers beyond the original 1-99, allowing more granular control without overlapping with extended ACL ranges.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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