ACA Aruba Associate Switching & VLANs 1 — Questions and Answers
Question 1: What is the purpose of a VLAN in a switched network?
- To logically segment network traffic into separate broadcast domains (Correct answer)
- To provide wireless connectivity to end users
- To route packets between different subnets
- To manage DHCP address allocation
Correct answer: To logically segment network traffic into separate broadcast domains
VLANs logically segment a switched network into separate broadcast domains, improving security and reducing unnecessary traffic.
Question 2: Which VLAN ID is the default VLAN on most Aruba switches?
- VLAN 1 (Correct answer)
- VLAN 100
- VLAN 999
- VLAN 4094
Correct answer: VLAN 1
VLAN 1 is the default VLAN on most Aruba switches and is pre-configured on all ports unless changed by an administrator.
Question 3: What is the difference between an access port and a trunk port on an Aruba switch?
- Access ports carry one VLAN; trunk ports carry multiple VLANs (Correct answer)
- Access ports carry multiple VLANs; trunk ports carry one VLAN
- Access ports use 802.1Q tags; trunk ports do not
- Access ports connect only to routers; trunk ports connect only to APs
Correct answer: Access ports carry one VLAN; trunk ports carry multiple VLANs
Access ports are configured for a single VLAN for end-device connectivity, while trunk ports carry multiple VLANs between switches or uplinks.
Question 4: Which IEEE standard defines VLAN tagging on trunk links?
- IEEE 802.1Q (Correct answer)
- IEEE 802.11ac
- IEEE 802.3af
- IEEE 802.1X
Correct answer: IEEE 802.1Q
IEEE 802.1Q is the standard that defines VLAN tagging, adding a 4-byte tag to Ethernet frames to identify which VLAN they belong to.
Question 5: What is a native VLAN on an 802.1Q trunk port?
- The VLAN whose traffic is sent untagged across the trunk (Correct answer)
- The VLAN with the highest priority
- The management VLAN for switch access
- The VLAN reserved for voice traffic
Correct answer: The VLAN whose traffic is sent untagged across the trunk
The native VLAN on an 802.1Q trunk is the VLAN whose frames are transmitted without a VLAN tag, typically VLAN 1 by default.
Question 6: On an Aruba CX switch, which command displays the VLAN database?
- show vlan (Correct answer)
- show interfaces
- show spanning-tree
- show ip route
Correct answer: show vlan
The show vlan command on Aruba CX switches displays all configured VLANs and their associated port memberships.
ACA Aruba Associate Switching & VLANs 1
What is the purpose of a VLAN in a switched network?