What does RSTP use to select the root bridge?

Last Updated: Mar 1, 2026
IT Exam Items Repository › Category: CCNA 2 v7 › What does RSTP use to select the root bridge?

What does RSTP use to select the root bridge?

  • The switch with the lowest BID.
  • The switch with the highest BID.
  • The switch with the lowest MAC address.
  • The switch with the highest extended system ID.

Explanation: RSTP selects the root bridge based on the lowest bridge ID. The bridge ID is a combination of the bridge priority (i.e., 32,768), the MAC address of the bridge, and the VLAN ID.

Related exam: 17.3.2 Module Quiz Answers - CCNA 200-301 Exam v1.1 Supplemental Module

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