mediumMultiple ChoiceObjective-mapped
350-701 Practice Question: Refer to the exhibit
Exhibit
ip access-list extended CLOUD-FILTER deny ip 10.0.0.0 0.255.255.255 any deny ip 172.16.0.0 0.15.255.255 any deny ip 192.168.0.0 0.0.255.255 any permit ip any any
Refer to the exhibit. A Cisco ASA firewall is deployed in a cloud environment. After applying this ACL to an interface, users report that they cannot access cloud instances from on-premises. What is the most likely cause?
⚠ Common exam trap
A common mix-up: candidates assume RFC 1918 blocks are safe for cloud environments, but cloud VPCs frequently use these private ranges, so blocking them breaks connectivity to cloud instances.
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
✓
The ACL blocks all RFC 1918 private addresses, which may include the cloud VPC CIDR
The ACL shown in the exhibit (which is not provided but implied by the question) blocks RFC 1918 private address ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). Cloud VPCs commonly use these private IP ranges for their instances. If the cloud VPC CIDR falls within an RFC 1918 range, the ACL will deny traffic to those cloud instances, preventing on-premises users from accessing them.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The ACL allows all traffic but users need NAT
Why it's wrong here
ACL blocks traffic before NAT.
- ✗
The ACL is applied to the wrong interface
Why it's wrong here
Not indicated in the scenario.
- ✓
The ACL blocks all RFC 1918 private addresses, which may include the cloud VPC CIDR
Why this is correct
Cloud VPCs often use private IP ranges, which are denied.
- ✗
The ACL permits only private addresses
Why it's wrong here
ACL denies private addresses.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-701 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 350-701 exam.