Application-level survivable software: rFTP proof-of-concept

Application-level survivability, the ability to reconfigure an application to transparently maintain services when part of a system becomes unavailable, is the most flexible and comprehensive approach to supporting mission fulfillment since it can provide assurance over all lower layers within a networked system. We have developed Resumable FTP, an application based on RFC 959, which has the ability to resume the download of a file after the download has been interrupted by users or by lower layers (loss of connection). We present the design and experimental use of rFTP and conclude with future directions for work in application-layer survivability