networking

Networking

MAC Flooding Explained: How Switch Tables Can Be Abused

Ethernet switches use a MAC address table to determine where frames should be forwarded. This allows switches to send traffic…

Networking

VLAN Hopping Attacks Explained: Double Tagging, Switch Spoofing and Prevention

VLAN hopping is a Layer 2 attack technique in which an attacker attempts to send or receive traffic across VLAN boundaries…

Networking

What Is IP Source Guard? Source Validation and Layer 2 Security

IP Source Guard (IPSG) is a Layer 2 security feature available on Cisco switches that helps prevent devices from using unauthorized…

Networking

What Is Dynamic ARP Inspection (DAI)? ARP Spoofing Protection Explained

Dynamic ARP Inspection (DAI) is a Layer 2 security feature used on network switches to help protect against ARP spoofing…

Networking

What Is DHCP Snooping? How Does It Stop Rogue DHCP Servers?

DHCP automatically provides devices with important network configuration such as IP addresses, subnet masks, default gateways,…

Networking

What Is BPDU Guard and Why Is It Important? Edge Ports and STP Security

Spanning Tree Protocol (STP) protects switched networks from Layer 2 loops. However, STP can also be affected when an unexpected…