Question 89 of 1,840
easyMultiple ChoiceObjective-mapped
350-401 Practice Question: Runs the following command on Switch SW5: SW5#…
A network engineer runs the following command on Switch SW5:
SW5# show spanning-tree vlan 50
VLAN0050 Spanning tree enabled protocol ieee Root ID Priority 24626 Address aabb.cc00.0800 Cost 4 Port 1 (GigabitEthernet0/1) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 50) Address aabb.cc00.0900 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- ------------------------------ Gi0/1 Root FWD 4 128.1 P2p Gi0/2 Desg FWD 4 128.2 P2p Gi0/3 Desg FWD 4 128.3 P2p Gi0/4 Altn BLK 4 128.4 P2p
Based on this output, how many ports are in the Forwarding state?
⚠ Common exam trap
Cisco often tests the ability to distinguish between port roles and port states; candidates may confuse the number of ports in a role (e.g., Root, Designated) with the number in the Forwarding state, or mistakenly count the Alternate port as forwarding because it has a role, ignoring its BLK state.
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
✓
3
The output shows four interfaces: Gi0/1 (Root FWD), Gi0/2 (Desg FWD), Gi0/3 (Desg FWD), and Gi0/4 (Altn BLK). Three ports (Gi0/1, Gi0/2, Gi0/3) are in the Forwarding state, while Gi0/4 is in the Blocking state. Therefore, the correct answer is 3.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
1
Why it's wrong here
Incorrect. There are three forwarding ports.
- ✗
2
Why it's wrong here
Incorrect. There are three forwarding ports.
- ✓
3
Why this is correct
Correct. Gi0/1, Gi0/2, and Gi0/3 are all in FWD state.
- ✗
4
Why it's wrong here
Incorrect. Gi0/4 is in BLK state.
Visual reference
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Last reviewed: Jul 4, 2026
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