Cisco Certified Network Professional Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for your Cisco Certified Network Professional Test with confidence. Study using flashcards and multiple choice questions, each with detailed hints and explanations. Ensure your success on the exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.


What is the effect of a hub or switch that does not send BPDUs in terms of protection?

  1. No impact on protection

  2. Increased protection

  3. Loss of protection

  4. Temporary disablement of the switch

The correct answer is: Loss of protection

The correct answer is that there would be a loss of protection. A hub or switch that does not send Bridge Protocol Data Units (BPDUs) essentially fails to participate in the Spanning Tree Protocol (STP) process. STP is a network protocol used to prevent loops in network topologies by determining the most efficient path for data traffic. BPDUs are essential for switches to share information about the state and identity of the network topology. When a switch does not send or receive BPDUs, it cannot effectively engage in decision-making processes to block redundant paths. This results in the potential for network loops to occur, which can lead to broadcast storms and ultimately network congestion or outages. Therefore, the lack of BPDUs leads to a loss of protection, as the necessary mechanisms to maintain a loop-free and efficient network topology are not operational. By not participating in STP through the transmission of BPDUs, the device compromises the integrity of network traffic management and fails to provide the necessary safeguards against network loops, leading to a clear loss of protection.