In STP, which device is elected as the root bridge?

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Question: In STP, which device is elected as the root bridge?

Options:

Correct Answer: The device with the lowest bridge ID

Solution:

The root bridge is elected based on the lowest bridge ID, which is a combination of bridge priority and MAC address.

In STP, which device is elected as the root bridge?

In STP, which device is elected as the root bridge?

Step 1: Understand that in a network using Spanning Tree Protocol (STP), a root bridge is a central device that helps manage data traffic.
Step 2: Know that each bridge (or switch) in the network has a unique identifier called a Bridge ID.
Step 3: The Bridge ID is made up of two parts: a bridge priority value and the MAC address of the bridge.
Step 4: The bridge priority is a number that can be set manually, and the MAC address is automatically assigned to the device.
Step 5: To elect the root bridge, all the bridges in the network compare their Bridge IDs.
Step 6: The bridge with the lowest Bridge ID (the lowest combination of bridge priority and MAC address) is elected as the root bridge.

Spanning Tree Protocol (STP) – A network protocol that ensures a loop-free topology for computer networks.
Root Bridge Election – The process by which a switch is designated as the root bridge based on the lowest bridge ID.
Bridge ID – A unique identifier for a switch in STP, consisting of a bridge priority and MAC address.