easyMultiple ChoiceObjective-mapped
200-201 Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit. ``` interface GigabitEthernet0/0 ip access-group BLOCK_P2P in ! ip access-list extended BLOCK_P2P deny tcp any any eq 6881 6889 deny udp any any range 6881 6889 permit ip any any ```
Refer to the exhibit. A network administrator applies this ACL to the WAN interface. What is the effect on BitTorrent traffic (which typically uses ports 6881-6889)?
⚠ Common exam trap
Cisco often tests the concept of ACL directionality, where candidates mistakenly think an inbound ACL on the WAN interface affects outgoing traffic, when in fact it only filters incoming traffic from the internet.
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
✓
Incoming BitTorrent traffic using ports 6881-6889 is blocked
The ACL shown in the exhibit (not provided here but implied by the question) is applied to the WAN interface and blocks incoming TCP traffic on ports 6881-6889. BitTorrent traffic typically uses these ports, so the ACL specifically denies incoming BitTorrent connections while leaving outgoing BitTorrent traffic unaffected. This is why option C is correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
All TCP traffic is blocked
Why it's wrong here
Only TCP on ports 6881-6889 is blocked; other TCP traffic is permitted.
- ✗
Only outgoing BitTorrent traffic is blocked
Why it's wrong here
The ACL is applied inbound, so it affects incoming traffic, not outgoing.
- ✓
Incoming BitTorrent traffic using ports 6881-6889 is blocked
Why this is correct
The ACL denies those ports inbound, blocking incoming BitTorrent connections.
- ✗
All BitTorrent traffic is permitted
Why it's wrong here
The ACL specifically denies the ports commonly used by BitTorrent.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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