Practice Quiz

Advanced Networking Administrator Test Prep

Category - CCNA

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David is working as a network advisor at his organization. Of late, a number of users are complaining about slow network performance, intermittent connectivity, and connection loss. A show interface command output verifies that the Ethernet interface configured as 100 Mbps full-duplex has a series of collisions. Which of the following could be the most likely cause of this problem?
  1. Routing loop
  2. Improperly configured root bridge
  3. Duplex mismatch
  4. Improperly configured static VLAN
Explanation
Answer: C - All these symptoms are due to a duplex mismatch.

Key Takeaway: Duplex mismatch is a condition where two connected devices operate in different duplex modes. Many times, we have a situation where one device operates in half-duplex, while the other one operates in full-duplex. This affects the network performance, making it slower and unreliable.
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