01
True or false
1 point
By default, frames in an IEEE 802.1Q trunk's native VLAN are sent untagged.
Free Practice Quiz Question List
3 Trunk Configuration Online Quiz Questions
Use this free practice quiz with 20 questions to review 3 Trunk Configuration, test your knowledge, and prepare for your next test or exam.
20 questions
02
Written response
1 point
In the example trunk configuration, what VLAN ID is configured as the native VLAN?
03
Choose one
1 point
What is the purpose of a trunk's allowed VLAN list?
- A
It identifies which switch is the spanning-tree root.
- B
It limits which VLANs can cross the trunk.
- C
It assigns IP addresses to hosts on the trunk.
- D
It determines the speed of the Ethernet link.
04
Fill in the blank
1 point
Complete the command to set the trunk's allowed list to VLANs 10, 20, and 99: switchport trunk allowed vlan
05
True or false
1 point
A trunk can be up even though a particular VLAN is absent from its allowed or active VLANs.
- A
True
- B
False
06
Written response
1 point
On a trunk interface, what command adds VLAN 30 to the existing allowed VLAN list without replacing the list?
07
Choose one
1 point
Which command is listed for checking VLAN membership and status on a switch?
- A
show interfaces trunk - B
show interfaces GigabitEthernet1/0/1 switchport - C
show vlan brief - D
no shutdown
08
Fill in the blank
1 point
If the two trunk ends have different native VLAN settings, untagged traffic can be assigned to at the two switches.
09
Choose all
1 point
Select all configuration steps needed for two switches to carry VLANs 10, 20, and 99 over their inter-switch link, with VLAN 99 as the native VLAN.
- A
Create VLANs 10, 20, and 99 on both switches.
- B
Configure the connecting interface as a trunk on both switches.
- C
Set VLAN 99 as the native VLAN at both ends.
- D
Allow VLANs 10, 20, and 99 on both trunk ends.
- E
Set VLAN 99 as native on one end and VLAN 1 as native on the other.
- F
Allow only VLANs 10 and 20, because native VLAN 99 bypasses the allowed list.
10
Choose one
1 point
Two switches have an 802.1Q trunk, but one end uses VLAN 99 as native and the other uses VLAN 1. What is a possible consequence?
- A
The allowed VLAN lists are automatically made identical.
- B
All frames for VLAN 99 become tagged.
- C
Untagged traffic can be assigned to different VLANs at the two switches.
- D
The link is automatically converted to an access port.
11
Choose all
1 point
Select all steps that form the described end-to-end connectivity test for VLAN 10 across two switches.
- A
Connect or configure an access port in VLAN 10 on each switch.
- B
Assign the two hosts addresses in the same IP subnet.
- C
Ping between the hosts.
- D
Configure the hosts in different VLANs and ping without routing.
12
Choose one
1 point
A trunk is configured with VLAN 99 as its native VLAN, but VLAN 99 is missing from its allowed list. Which statement is correct?
- A
VLAN 99 data will cross because native VLANs are always allowed.
- B
VLAN 99 data will not cross unless VLAN 99 is included in the allowed list.
- C
The switch will automatically add VLAN 99 to the allowed list.
- D
The trunk will carry only untagged traffic.
13
Open ended
1 point
Two switches are already connected by a trunk with an allowed VLAN list that must be preserved. Describe how to make VLAN 30 cross the trunk and how to verify the change.
14
Choose one
1 point
A trunk uses VLAN 99 as its native VLAN and carries VLANs 10 and 20 as well. Which frames are normally sent untagged?
- A
VLAN 10 frames
- B
VLAN 99 frames
- C
VLAN 20 frames
- D
All frames
15
True or false
1 point
True or false: A trunk can be operational even if a particular VLAN is absent from its allowed or active VLANs.
- A
True
- B
False
16
Written response
1 point
A trunk uses VLAN 99 as its native VLAN. Which VLAN ID must also appear in the trunk’s allowed list for VLAN 99 to carry data across the link?
17
Choose one
1 point
An existing trunk allowed list must be preserved while VLAN 30 is added. Which command does this?
- A
switchport trunk allowed vlan 30 - B
switchport trunk allowed vlan add 30 - C
switchport trunk native vlan 30 - D
switchport mode trunk add 30
18
Written response
1 point
Which Cisco IOS command displays the switchport settings for interface GigabitEthernet1/0/1?
19
Choose one
1 point
A trunk already allows VLAN 30. What happens if switchport trunk allowed vlan 10,20,99 is entered on that interface?
- A
It adds VLANs 10, 20, and 99 to the existing list.
- B
It sets VLAN 99 as the native VLAN and leaves the allowed list unchanged.
- C
It replaces the allowed list with VLANs 10, 20, and 99.
- D
It allows only VLAN 10 and VLAN 20, because the native VLAN is automatically excluded.
20
Choose one
1 point
Which command is used to check operational trunk state and VLAN membership on a switch?
- A
show interfaces trunk - B
show vlan brief - C
show interfaces GigabitEthernet1/0/1 switchport - D
show running-config vlan
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