@misc{rfc2153,
    series =    {Request for Comments},
    number =    2153,
    howpublished =  {RFC 2153},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC2153},
    url =       {https://www.rfc-editor.org/info/rfc2153},
    author =    {William A. Simpson},
    title =     {{PPP Vendor Extensions}},
    pagetotal = 6,
    year =      1997,
    month =     may,
    abstract =  {The Point-to-Point Protocol (PPP) provides a standard method for transporting multi-protocol datagrams over point-to-point links. PPP defines an extensible Link Control Protocol (LCP) for establishing, configuring, and testing the data-link connection; and a family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols. This document provides information for the Internet community. It does not specify an Internet standard of any kind.},
}