Blockchain & Cryptocurrency Glossary

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KVM Switch

1 min read
Pronunciation
[kay-vee-em switch]
Analogy
Like a TV input selector that lets you switch between cable, game console, and DVD player with one remote.
Definition
A hardware device that allows a user to control multiple computers using a single keyboard, video monitor, and mouse, often used in server operations to manage blockchain nodes.
Key Points Intro
KVM switches streamline multi‑node management by centralizing console access.
Key Points

Port selection: Switch between machines via hotkey or button.

Video standards: HDMI, DisplayPort, VGA support.

USB sharing: Keyboard/mouse multiplexing.

Remote KVM: IP‑based access for headless servers.

Example
A validator operator uses a 4‑port KVM switch to manage four Ethereum nodes from one keyboard and monitor setup.
Technical Deep Dive
KVM switch firmware enumerates as USB HID device to each host. Video mux uses crosspoint switches. IP‑KVM models encode video over Ethernet with H.264 compression and TLS for remote access.
Security Warning
KVM over IP can be intercepted; enforce strong authentication and network isolation.
Caveat
Physical proximity required for non‑IP models; cable management can be complex.
Related Terms
IPMI

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