Edward Mooney

Protecting Your Network with Cisco DHCP Snooping DHCP Snooping is a Layer 2 security feature available on Cisco switches that prevents unauthorized DHCP servers from distributing IP a...

How to Troubleshoot Cisco EtherChannel Problems EtherChannel allows multiple physical interfaces to operate as a single logical link. It improves bandwidth and redundancy, but it only works...

Diagnosing Cisco Trunk Port Mismatches Using IOS Trunk links connect switches and carry traffic for multiple VLANs using IEEE 802.1Q tagging. When trunk ports are misconfigured, VLAN traffi...

How to Troubleshoot a Cisco STP Blocking Port Spanning Tree Protocol (STP) prevents Layer 2 loops by placing redundant ports into a blocking state. This is normal behavior in a switched net...

Practical Cisco VLAN Troubleshooting Using IOS Commands Virtual LANs (VLANs) are fundamental to network segmentation in enterprise enviro...

Troubleshooting Cisco DHCP Relay with ip helper-address In many enterprise networks, DHCP servers are located in a centralized server VLAN while clients exist in many different subnets. Sin...

🔐 The Art of the Ethical Hack: Who’s Testing Your Locks? We’re not cracking safes or wearing black hoodies today — but we are going on a...

Why Use Static Routing in Modern Networks When people first learn routing, dynamic protocols like OSPF, EIGRP, or BGP often get all the a...