Câu 19: 640-875: Building Cisco Service Provider Next-Generation Networks Part 1 (SPNGN1)

Which statement about STP operations is true?

1. A. One root bridge exists per collision domain.
2. B. One root port is established per root bridge.
3. C. One designated port is defined per segment. — đáp án hiện tại
4. D. Non-designated ports are set in the forwarding state.
5. E. One root port exists per broadcast domain.