[1] Simpson, W., "The Point-to-Point Protocol", RFC 1331, May 1992. [2] Postel, J., "Internet Protocol", RFC 791, USC/Information Sciences Institute, September 1981. [3] Jacobson, V., "Compressing TCP/IP Headers", RFC 1144, January 1990. [4] Postel, J., "The TCP Maximum Segment Size Option and Related Topics", RFC 879, USC/Information Sciences Institute, November 1983. [5] Mogul, J., and S. Deering, "Path MTU Discovery", RFC 1191, November 1990. [6] Reynolds, J., and J. Postel, "Assigned Numbers", RFC 1060, USC/Information Sciences Institute, March 1990. [7] Perkins, D., and R. Hobby, "Point-to-Point Protocol (PPP) initial configuration options", RFC 1172, August 1990.