ACA Aruba Associate Switching & VLANs 2

Question 1

What is Spanning Tree Protocol (STP) designed to prevent in a switched network?

Accepted Answer

Layer 2 loops

Answer

STP prevents Layer 2 loops in switched networks by blocking redundant paths and allowing only one active path between switches.

Question 2

Which STP port state actively forwards traffic in a classic 802.1D implementation?

Accepted Answer

Forwarding

Answer

The Forwarding state is the only STP port state where a port actively forwards user traffic on the network.

Question 3

What is MSTP and what problem does it solve over classic STP?

Accepted Answer

Multiple Spanning Tree Protocol; maps multiple VLANs to fewer STP instances for efficiency

Answer

MSTP maps multiple VLANs to a smaller number of spanning tree instances, reducing CPU overhead compared to running one STP instance per VLAN.

Question 4

What is the function of a link aggregation group (LAG) on Aruba switches?

Accepted Answer

To bundle multiple physical links into one logical link for increased bandwidth and redundancy

Answer

A LAG bundles multiple physical Ethernet links into a single logical link to increase bandwidth and provide link-level redundancy.

Question 5

Which protocol dynamically negotiates link aggregation between Aruba switches?

Accepted Answer

LACP

Answer

LACP (Link Aggregation Control Protocol) is the IEEE 802.3ad standard that dynamically negotiates and manages link aggregation groups.

(ACA) Aruba Certified Associate Certification Practice Test