Question

Which two types of Spanning Tree protocols can cause suboptimal traffic flows because they assume only one Spanning-Tree instance for the entire bridged network?

1) Rapid Spanning Tree Protocol (RSTP)
2) Multiple Spanning Tree Protocol (MSTP)
3) Spanning Tree Protocol (STP)
4) Transparent Interconnection of Lots of Links (TRILL)

Answer 1

STP and RSTP can cause suboptimal traffic flows by assuming a single Spanning-Tree instance for the entire network, unlike MSTP which supports multiple instances for better traffic management.

Step-by-step explanation:

The two types of Spanning Tree protocols that can cause suboptimal traffic flows because they assume only one Spanning-Tree instance for the entire bridged network are 1) Spanning Tree Protocol (STP) and 3) Rapid Spanning Tree Protocol (RSTP). These protocols create a single instance of Spanning Tree for the entire network, which could lead to inefficient paths in a diverse or complex network environment where multiple paths exist. Whereas Multiple Spanning Tree Protocol (MSTP) allows for multiple instances of Spanning Tree to coexist, significantly improving traffic flow management. Lastly, Transparent Interconnection of Lots of Links (TRILL) is actually designed to overcome the limitations of STP-based networks by allowing for multiple paths and using a routing approach to avoid loops.