
The interplanetary network that Vint Cerf envisioned years ago got its first real test recently. The EPOXI spacecraft, which carried the Deep Impact probe to Comet Talent 1 in 2005, had its software reconfigured after delivering the payload to work as a test bed for NASA's new Disruption-Tolerant Networking protocol. As the craft dropped back toward Earth for one of the gravity assists that will ultimately sling it back toward the comet in 2010, it transmitted simulated images of the Martian moon Phobos using the new protocol.