mediumMultiple ChoiceObjective-mapped
200-901 Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit. ``` Switch# show vlan brief VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Gi0/1, Gi0/2 10 Engineering active Gi0/3, Gi0/4 20 Marketing active Gi0/5, Gi0/6 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup ```
Refer to the exhibit. A switch has the VLAN configuration shown. If a device is connected to interface Gi0/3 and another to Gi0/5, can they communicate if the switch is not configured with any inter-VLAN routing?
⚠ Common exam trap
Many exam-takers assume all ports on the same switch can communicate by default, overlooking that VLANs create isolated Layer 2 domains that require routing to interconnect.
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
✓
No, because they are in different VLANs and no routing is configured.
Devices in different VLANs (VLAN 10 and VLAN 20) are on separate Layer 2 broadcast domains. Without inter-VLAN routing (either a Layer 3 switch with IP routing enabled or an external router), traffic cannot cross VLAN boundaries, even if the devices share the same physical switch. The switch forwards frames only within the same VLAN unless routing is explicitly configured.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Yes, if the default gateway is configured on each device.
Why it's wrong here
Default gateway is needed for inter-VLAN, but without a router it still fails.
- ✗
No, because VLAN 20 is not active on those ports.
Why it's wrong here
VLAN 20 is active on Gi0/5 and Gi0/6.
- ✓
No, because they are in different VLANs and no routing is configured.
Why this is correct
VLANs isolate traffic; inter-VLAN requires layer 3 routing.
- ✗
Yes, if the devices have IP addresses in the same subnet.
Why it's wrong here
Even if same subnet, they are on different broadcast domains.
- ✗
Yes, because all ports are on the same switch.
Why it's wrong here
Same switch does not guarantee communication across VLANs.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 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 200-901 exam.