DisplayLink is a display technology used by adapter or dock-like devices to send video from a computer to a monitor through an intermediary link, often USB. Instead of relying only on a native graphics port, it uses software drivers and device-side hardware to present output on a modern screen. This makes it useful for docking stations, USB display adapters, and some compatibility setups for older systems.
In cyber security, DisplayLink matters because it adds another trusted device, driver, and firmware layer between the host and the monitor. That expands the attack surface: a malicious or compromised adapter can become an untrusted peripheral, and the required driver can also be a target for abuse. Defenders care because dock and USB graphics devices should be inventoried, updated, and restricted where possible. In practice, DisplayLink appears both as a convenience for extending or preserving display access and as a reminder that peripherals are part of the security boundary.