How Clouds Pretend to be Local Networks

VXLAN allows massive cloud data centers to act as if they are one single, local network. By wrapping data inside standard internet packets, it bridges physical gaps to support millions of virtual machines.

In the past, networking limits held back large-scale cloud growth because traditional systems couldn't handle more than a few thousand distinct networks. VXLAN solves this by essentially mailing data packets inside protective envelopes, hiding the complex infrastructure underneath. This technique allows massive cloud platforms to scale their connectivity without breaking the underlying hardware. It is the hidden glue that makes modern cloud computing possible.