Practice Quiz

Advanced Networking Administrator Test Prep

Category - CCNA

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Which of the following fields make up a switch’s bridge ID (BID)?
  1. IP address and Bridge priority
  2. MAC address and Bridge priority
  3. Port priority and MAC address
  4. Port priority and IP address
Explanation
Answer: B - The bridge ID is made up of a MAC address and Bridge priority.

Key Takeaway: Bridge ID is used to select the root bridge of a spanning tree. It is made up of the MAC address and the bridge’s priority value. Active bridges use this bridge ID to determine the cheapest transmission path to the root bridge.
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