mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Examine the following configuration: ```…
Examine the following configuration: ```
interface GigabitEthernet0/3 ip access-group WEB_ONLY out
!
ip access-list extended WEB_ONLY permit tcp any any eq 80 permit tcp any any eq 443
``` What is the effect of this ACL when applied outbound on GigabitEthernet0/3?
⚠ Common exam trap
Cisco often tests the implicit deny any concept and the distinction between inbound and outbound ACL application, causing candidates to overlook that an ACL without an explicit deny still denies all non-permitted traffic.
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
✓
It permits only HTTP and HTTPS traffic to leave the interface; all other traffic is denied.
The ACL named WEB_ONLY explicitly permits TCP traffic destined for ports 80 (HTTP) and 443 (HTTPS). When applied outbound on GigabitEthernet0/3, it filters traffic leaving the interface. Since every ACL has an implicit deny any at the end, only HTTP and HTTPS traffic is permitted outbound; all other traffic is denied.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It permits all web traffic entering the interface.
Why it's wrong here
Incorrect. The ACL is applied outbound, so it filters traffic leaving the interface.
- ✓
It permits only HTTP and HTTPS traffic to leave the interface; all other traffic is denied.
Why this is correct
Correct. The ACL permits web traffic and implicitly denies everything else.
- ✗
It permits all TCP traffic to any destination.
Why it's wrong here
Incorrect. Only TCP traffic to ports 80 and 443 is permitted.
- ✗
It has no effect because the ACL is missing a deny statement.
Why it's wrong here
Incorrect. There is an implicit deny at the end of every ACL.
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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.