01
True or false
1 point
True or false: When a switch receives a frame whose destination MAC address is unknown, it floods the frame within that VLAN.
Free Practice Quiz Question List
3 Ethernet Switching and VLANs Online Quiz Questions
Use this free practice quiz with 20 questions to review 3 Ethernet Switching and VLANs, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
A workstation connects to a switch port assigned to a single user VLAN. Which description best fits the intended access-port behavior?
- A
It carries multiple VLANs and tags every frame.
- B
It carries one data VLAN and normally sends and receives untagged frames.
- C
It carries one data VLAN and tags every frame.
- D
It carries multiple VLANs but sends all frames untagged.
03
True or false
1 point
True or false: On a Layer 2 switch, configuring a management SVI address alone is typically sufficient for the switch to reply to management devices on other subnets.
- A
True
- B
False
04
Written response
1 point
When a switch learns which port is associated with a device, which address in the received frame does it use?
05
Fill in the blank
1 point
VLANs divide a switched network into separate logical .
06
Choose one
1 point
A trunk carries several VLANs. How is traffic for its native VLAN typically transmitted?
- A
Native VLAN traffic is always tagged with an 802.1Q tag.
- B
Native VLAN traffic is typically untagged.
- C
A trunk carries only native VLAN traffic.
- D
A trunk cannot carry VLAN-tagged traffic.
07
Choose all
1 point
When troubleshooting a trunk link, which two settings should you compare at both ends? Select all correct answers.
- A
Allowed VLANs
- B
PortFast status
- C
Native VLAN
- D
Management SVI IP address
08
Fill in the blank
1 point
shuts an edge port if that port receives a BPDU.
09
Written response
1 point
In the example configuration, what VLAN ID is assigned to the office workstation access ports?
10
Choose all
1 point
Which statements correctly describe PortFast and BPDU Guard? Select all correct answers.
- A
PortFast allows an edge port to reach forwarding promptly.
- B
PortFast should be enabled only on ports connected to end devices.
- C
PortFast is appropriate for ordinary switch-to-switch links.
- D
BPDU Guard shuts an edge port if it receives a BPDU.
11
Choose one
1 point
A network has redundant switch links. Which outcome best describes how STP manages those links?
- A
It disables every redundant link permanently.
- B
It forwards all redundant paths simultaneously to maximize bandwidth.
- C
It prevents Layer 2 loops by placing redundant paths into a non-forwarding state, and can activate an alternate path after a failure.
- D
It routes traffic between VLANs using the root bridge.
12
Choose one
1 point
A Layer 2 switch has an IP address configured on its management SVI. Which statement accurately describes what that SVI does?
- A
It routes between VLANs as soon as an IP address is assigned.
- B
It provides IP connectivity to the switch but does not, by itself, route traffic between VLANs.
- C
It replaces the need for the management VLAN to reach the switch.
- D
It automatically supplies a default gateway to the switch.
13
Open ended
1 point
A Layer 2 switch cannot be reached remotely for command-line management. Describe four checks that would help diagnose the problem, including at least one check for connectivity beyond the management subnet.
14
True or false
1 point
True or false: Devices in different VLANs can communicate directly at Layer 2 without a router or Layer 3 switch.
- A
True
- B
False
15
Choose one
1 point
A switch receives a unicast frame whose destination MAC address is not in its forwarding table. What does the switch do with the frame?
- A
Send it only to the port where the destination MAC address was last learned, even if that entry is absent.
- B
Flood it out the other ports in the same VLAN.
- C
Flood it out every port in every VLAN.
- D
Drop it because its destination MAC address is unknown.
16
Choose one
1 point
Two hosts are assigned to different VLANs on the same switched network. What is required for them to communicate with each other?
- A
They communicate directly at Layer 2 as long as both ports are access ports.
- B
They communicate directly if their switches use the same trunk native VLAN.
- C
Their traffic must be routed by a router or Layer 3 switch.
- D
They communicate directly if both switches have learned their MAC addresses.
17
Choose one
1 point
A workstation connects to one switch port, while an uplink between switches must carry several VLANs. Which configuration best matches these roles?
- A
The access port carries one data VLAN and normally uses untagged frames; the trunk carries multiple VLANs and generally tags their traffic.
- B
The access port carries multiple tagged VLANs; the trunk carries one untagged VLAN.
- C
Both port types carry multiple VLANs, but only access ports use 802.1Q tags.
- D
An access port routes between VLANs, while a trunk port prevents inter-VLAN routing.
18
Choose one
1 point
A switched network has redundant Layer 2 links. Which outcome should you expect when Spanning Tree Protocol operates normally?
- A
It disables all redundant links permanently so that no alternate path can be used.
- B
It forwards frames over all links and relies on MAC learning to stop loops.
- C
It converts redundant Layer 2 links into routed links.
- D
It places redundant paths in a non-forwarding state and can activate an alternate path after a failure.
19
Written response
1 point
What IEEE standard defines VLAN-aware bridging and tagging?
20
Written response
1 point
On many Cisco IOS XE switches, what command saves the verified running configuration as the startup configuration?