%% You should probably cite draft-ietf-radext-tcp-transport instead of this I-D.
@techreport{dekok-radext-tcp-transport-01,
    number =    {draft-dekok-radext-tcp-transport-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-dekok-radext-tcp-transport/01/},
    author =    {Alan DeKok},
    title =     {{RADIUS Over TCP}},
    pagetotal = 16,
    year =      2008,
    month =     nov,
    day =       2,
    abstract =  {The Remote Authentication Dial In User Server (RADIUS) Protocol has traditionally used the User Datagram Protocol (UDP) as it's underlying transport layer. This document defines RADIUS over the Transmission Control Protocol (TCP).},
}