M11 - Securing the Weakest Link - Layer 2 Switch Security - Cisco CCNA Routing & Switching скачать в хорошем качестве

M11 - Securing the Weakest Link - Layer 2 Switch Security - Cisco CCNA Routing & Switching

In this video, we walk through the core techniques used to harden Layer 2 switches and protect the network edge from unauthorized access and protocol attacks. You’ll learn how port-level security controls help prevent unknown devices from connecting to the network. We begin with best practices such as shutting down unused ports and limiting MAC address access using port security. You’ll also see how the protect, restrict, and shutdown violation modes behave and when to use each one. Next, we explore key Cisco mitigation features, including DHCP snooping, Dynamic ARP Inspection, and BPDU Guard, which defend against common Layer 2 attacks. The video finishes with a look at PortFast and how it improves performance for end devices while maintaining security. Ideal for CCNA preparation or hands-on labs, this guide helps you build a more secure access layer.