Episode 14: OSI Layer 3 — The Network Layer

Episode 14: OSI Layer 3 — The Network Layer

This episode focuses on the Network Layer of the OSI model, where logical addressing and routing decisions occur. It explains how Internet Protocol (IP) operates at this layer, enabling data to move between networks rather than just between directly connected devices. Key functions such as addressing, packet forwarding, and path determination are introduced, providing the foundation for understanding how routers manage traffic across complex environments. Recognizing the role of the Network Layer is essential for interpreting both exam questions and real-world architectures.

Practical applications are discussed, including the use of subnetting to organize IP addresses, the role of routing tables in selecting paths, and the differences between IPv4 and IPv6 addressing. You will also see how errors at this layer manifest, such as misconfigured gateways or routing loops, and how they can be diagnosed. By mastering the concepts of the Network Layer, you build the skills needed to analyze data flows and ensure proper connectivity across diverse network topologies. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your certification path.

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Episoder(185)

Welcome to the CompTIA Network+ Certification Audio Course

Welcome to the CompTIA Network+ Certification Audio Course

14 Okt 20252min

Episode 184: Network Troubleshooting Methodology Recap and Exam Readiness

Episode 184: Network Troubleshooting Methodology Recap and Exam Readiness

To wrap up the series, this episode reviews the full troubleshooting methodology—from identifying the problem to documenting the fix. We walk through common scenarios, showing how the steps apply in r...

20 Jul 202513min

Episode 183: BYOD, Licensing Issues, and Troubleshooting Oddities

Episode 183: BYOD, Licensing Issues, and Troubleshooting Oddities

Not every issue fits into neat categories. In this episode, we address edge-case problems like Bring Your Own Device (BYOD) compatibility, expired licenses on security appliances, and odd client behav...

20 Jul 202518min

Episode 182: Optical, Hardware, and Performance Issues — Identifying and Resolving Problems

Episode 182: Optical, Hardware, and Performance Issues — Identifying and Resolving Problems

This episode revisits advanced troubleshooting at the hardware and optical layer. We cover transceiver problems, dirty fiber connectors, power mismatches, and switch backplane limitations. You'll lear...

20 Jul 202514min

Episode 181: DNS and NTP Failures — Troubleshooting Name and Time Resolution

Episode 181: DNS and NTP Failures — Troubleshooting Name and Time Resolution

DNS and NTP are often invisible—until they fail. This episode shows how to diagnose and fix issues with domain name resolution and time synchronization, both of which affect authentication, connectivi...

20 Jul 202515min

Episode 180: Asymmetric Routing, Multicast Flooding, and ACL Misconfigurations

Episode 180: Asymmetric Routing, Multicast Flooding, and ACL Misconfigurations

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 traffi...

20 Jul 202514min

Episode 179: Collision Domains, Broadcast Storms, and Routing Loops

Episode 179: Collision Domains, Broadcast Storms, and Routing Loops

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 performanc...

20 Jul 202514min

Episode 178: Routing Troubleshooting — Missing Routes, DHCP, and Address Conflicts

Episode 178: Routing Troubleshooting — Missing Routes, DHCP, and Address Conflicts

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 ro...

20 Jul 202514min

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