ISA/IEC 62443 Cybersecurity Fundamentals Specialist (IC32) Practice Test

VLAN Hopping refers to a type of attack that exploits the way Virtual Local Area Networks (VLANs) are configured within a network. Specifically, it is associated with switch spoofing, which involves an attacker compromising a switch to gain unauthorized access to VLANs that should be segregated from one another. In switch spoofing, an attacker can configure their device to appear as a switch, effectively tricking another switch into thinking it is a legitimate trunk link. This allows the attacker to send data across different VLANs without proper authorization, thereby breaching the isolation that VLANs are meant to provide. Understanding this concept is crucial because VLANs are used to segment network traffic for security and performance reasons, and any bypassing of these segments can lead to significant security vulnerabilities. Recognizing the relationship between VLAN Hopping and switch spoofing helps in implementing better security measures, such as disabling unused ports and only allowing necessary trunk links between switches.