Episode 80: Network Outages — Slow Speeds, Port Flapping, DNS Failures

When the network stops working or slows to a crawl, multiple causes could be at play, and this episode helps you navigate them. We begin with slow speeds caused by congestion, bad cabling, duplex mismatches, or faulty devices. Then we move into port flapping, where a switch port goes up and down repeatedly due to link negotiation failures or failing hardware.

Finally, we explore DNS-related issues and how a simple misconfiguration or unreachable server can prevent users from accessing websites—even when other parts of the network are fine. You’ll learn how to interpret vague complaints and apply a structured approach to identifying the true point of failure. These topics are a frequent source of scenario-based exam questions and real-world tech frustrations. Brought to you by BareMetalCyber.com.