Vinton Gray Cerf · "Interplanetary Internet is not science fiction; it’s an engineering project wa..."

Discussing NASA’s Delay-Tolerant Networking (DTN) protocol, *BBC Future*, 2013 · Checked on 17 March 2026

Interplanetary Internet is not science fiction; it’s an engineering project waiting to happen.

Analysis

Cerf’s statement accurately reflects the status of the **Interplanetary Internet** as of 2013. NASA and the **InterPlanetary Networking Special Interest Group (IPNSIG)** had been developing **DTN**—a suite of protocols designed to enable communication across extreme distances and disruptions (e.g., planetary rotations or solar interference)—since the late 1990s. By 2013, DTN had been successfully tested in missions like the **Deep Impact spacecraft** (2008) and the **International Space Station (ISS)** (2009–2012), proving its feasibility. Cerf, a co-designer of DTN, was not speculating but describing an ongoing, well-documented engineering effort.

Background

The **Interplanetary Internet** is an extension of Earth’s internet designed to function in space, where traditional TCP/IP protocols fail due to long delays and frequent disconnections. NASA’s **DTN architecture** (RFC 4838, 2007) uses a **store-and-forward** method, where data is held at nodes until a stable connection is re-established—akin to a 'postal system' for space. Cerf, often called a 'father of the internet,' has been a key advocate for DTN since its inception, collaborating with NASA’s Jet Propulsion Laboratory (JPL) and other agencies.

Verdict summary

Vinton Cerf’s 2013 claim about the Interplanetary Internet being an engineering reality aligns with NASA’s active development and testing of Delay-Tolerant Networking (DTN) protocols, which were already operational in space missions by that time.

Sources consulted

— NASA JPL. (2008). *NASA Successfully Tests First Deep Space Internet*. [Press Release](https://www.jpl.nasa.gov/news/news.php?feature=1792)

— Burleigh, S. et al. (2007). *Delay-Tolerant Networking: An Approach to Interplanetary Internet*. IEEE Communications Magazine, 45(5), 116–122. [DOI:10.1109/MCOM.2007.358548](https://doi.org/10.1109/MCOM.2007.358548)

— BBC Future. (2013). *How the ‘interplanetary internet’ could change space science*. [Article](https://www.bbc.com/future/article/20130701-how-the-interplanetary-internet-works)

— NASA. (2012). *DTN Demonstrated on the International Space Station*. [Report](https://www.nasa.gov/mission_pages/station/research/experiments/explorer/Investigation.html?#id=877)

— IPNSIG. (2023). *Delay-Tolerant Networking: Standards and Implementations*. [Website](https://ipnsig.org/)