Networking

Networking

802.1X Authentication Explained: Supplicant, Authenticator and RADIUS

802.1X is a standard for port-based network access control. It allows a network to authenticate a device or user before…

Networking

What Is Network Access Control (NAC)? Authentication, Device Posture and 802.1X

Network Access Control (NAC) is a security approach that controls which users and devices are allowed to connect to a network…

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…