Free Practice Quiz Question List

1 Layer 2 Switching Fundamentals Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Layer 2 Switching Fundamentals, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: A Layer 2 switch uses the destination MAC address, rather than the destination IP address, to decide which port should receive an Ethernet frame.

A
True
B
False

Choose one

1 point

A frame arrives on port 3. Its destination MAC address is known in the applicable VLAN and maps to port 8. What should the switch do?

A
Flood it out every eligible port in every VLAN.
B
Forward it only through the port associated with that destination in the applicable VLAN.
C
Send it to a Layer 3 device because all unicast frames require routing.
D
Discard it because known destinations cannot be forwarded.

Fill in the blank

1 point

Where VLANs are used, a switch’s MAC address table associates a MAC address with a port and a .

Choose one

1 point

A switch receives a frame whose destination MAC address is absent from the table. Which action is appropriate?

A
Send it only to the port that received it.
B
Flood it to eligible ports in every VLAN.
C
Flood it to eligible ports in the same VLAN, except the incoming port.
D
Drop it because the destination is not in the table.

True or false

1 point

True or false: Communication between separate IP networks requires Layer 3 forwarding; a Layer 2 switch alone does not provide it.

A
True
B
False

Choose all

1 point

Select all statements that correctly describe how a switch applies VLAN boundaries to MAC learning and unknown-unicast forwarding.

A
MAC learning and forwarding apply within the relevant VLAN.
B
An unknown unicast is flooded to eligible ports in every VLAN.
C
An unknown unicast is flooded within its VLAN, except back out the incoming port.
D
A Layer 2 switch automatically routes between VLANs.

Written response

1 point

What is the term for removing dynamically learned MAC table entries after they have been inactive for a period of time?

Fill in the blank

1 point

If a frame’s known destination is on the same port where the frame arrived, the switch the frame rather than sending it back out that port.

Choose one

1 point

A host moves from port 2 to port 6 and then sends a frame. What can the switch do with its learned MAC table entry?

A
The switch must keep the old location until an administrator changes it.
B
The switch can update the entry when it receives a frame from the host on the new port.
C
The switch immediately routes the host’s traffic to a different IP network.
D
The switch must permanently flood all frames for that host.

Choose all

1 point

Select all statements supported about how MAC address table entries are created and maintained.

A
MAC table entries can be learned dynamically.
B
All MAC table entries must be configured statically.
C
Some devices and configurations can use static entries.
D
Dynamically learned entries are never removed after inactivity.

Written response

1 point

Give one common alternative name for a switch’s MAC address table.

Choose one

1 point

A switch receives a frame and needs to learn which port the sending device is using. Which frame field supplies the address it learns?

A
The destination IP address
B
The destination MAC address
C
The incoming port number alone
D
The source MAC address

Written response

1 point

Which MAC address field does a switch use to learn a device’s location from an arriving frame?

Open ended

1 point

PC-A is connected to port 1 and PC-B to port 2 in the same VLAN. The switch has not learned either MAC address. Describe what the switch learns and how it forwards PC-A’s first frame, PC-B’s reply, and later frames between the PCs.

Choose one

1 point

A Layer 2 switch receives an Ethernet frame and must decide which port should receive it. Which header field does it use for that forwarding decision?

A
The destination MAC address
B
The source MAC address
C
The destination IP address
D
The source IP address

True or false

1 point

True or false: A Layer 2 switch floods a broadcast frame within its VLAN, except back out the port on which the frame arrived.

A
True
B
False

Written response

1 point

What is the term for removing a dynamically learned MAC address table entry after it has been inactive for a period of time? Enter one term.

Choose one

1 point

A frame arrives on port 4, and its destination MAC address is absent from the applicable VLAN's table. What should the switch do?

A
Send it only to the port with the lowest number in the VLAN.
B
Flood it to eligible ports in the same VLAN, except the incoming port.
C
Flood it to every port in every VLAN, including the incoming port.
D
Discard it because its destination is not in the table.

Choose one

1 point

A switch receives a frame whose destination MAC address is learned on the same port where the frame arrived. What does the switch do with the frame?

A
Flood it to all eligible ports in the VLAN.
B
Send it back out the incoming port.
C
Filter it instead of sending it back out the incoming port.
D
Route it through a Layer 3 device.

Choose one

1 point

A switch has a valid entry mapping a frame's destination MAC address to port 8. The frame arrived on port 3, and port 8 is eligible to forward. Which action is correct?

A
Forward it out the port associated with that destination MAC address only.
B
Flood it to all ports in the VLAN.
C
Send it to every port except the one where the destination was learned.
D
Discard it because the destination is already known.

1 Layer 2 Switching Fundamentals Online Quiz Questions

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