Certified - CompTIA Network + Audio Course

Some network issues are subtle, involving advanced concepts like asymmetric routing, multicast flooding, and access control list (ACL) errors. This episode explains how asymmetric routing—where traffic returns on a...

Poor network segmentation can lead to serious Layer 2 and Layer 3 problems. In this episode, we explain how excessive collision domains on legacy hubs or poorly configured switches can slow performance and cause...

Routing issues can silently break connectivity—even if everything looks fine at Layer 2. In this episode, we diagnose common routing problems, including missing default routes, misconfigured static routes, and...

Sometimes network issues stem from the basics: incorrect VLAN assignment, disabled interfaces, or outdated configurations. This episode walks through foundational network checks that resolve a surprising number of...

Even if the signal is strong, configuration mistakes can block connectivity. This episode addresses common wireless configuration errors such as mismatched SSIDs, incorrect security settings, or outdated drivers on...

Signal problems are among the most common wireless complaints—and many stem from poor antenna planning. This episode examines how antenna placement, orientation, and environment affect signal propagation. You'll learn...

Wireless technology is incredibly convenient—but also limited by physical and environmental factors. In this episode, we explore the inherent constraints of wireless communication, such as reduced throughput compared to...

Every device platform—whether Cisco, Juniper, or another—has its own diagnostic approach. In this episode, we explore common troubleshooting techniques across routers and switches, focusing on interface states, routing...

Some of the most essential network management tools are also the most overlooked. This episode covers infrastructure tools such as TFTP servers for file transfers, terminal emulators like PuTTY and SecureCRT for CLI...

Network visibility starts with knowing what’s on your network. In this episode, we explain network discovery techniques using tools like ping sweeps, SNMP queries, and Nmap scans to identify devices, operating systems...

To truly understand what’s happening on the network, you need to inspect the packets themselves. This episode introduces tools like Wireshark, tcpdump, and protocol analyzers that allow you to capture and analyze live...

Wireless networks introduce a layer of complexity that often demands specialized tools for visibility. In this episode, we cover wireless troubleshooting utilities including site survey tools, spectrum analyzers, and...

Fiber requires a different class of diagnostic tools due to its precision and sensitivity. In this episode, we cover devices like OTDRs (Optical Time Domain Reflectometers), power meters, and visual fault locators...

Troubleshooting starts with the right tools. In this episode, we walk through the essential cable testing and installation tools you’ll use on the job. These include crimpers for RJ-45 connectors, punchdown tools for...

Link-level problems are easy to overlook but frequently cause intermittent issues. This episode explores duplex mismatches—where one device is set to full duplex and the other to half—leading to collisions...