C 0768, Internet Engineering Task Force, August 1980. 67. Postel, J. Transmission Control Protocol. RFC 0793, Internet Engineering Task Force, September 1981. 68. Postel, J. TCP maximum segment size and related topics. RFC 0879, Internet Engineering Task Force, November 1983. 69. McCann, J., Deering, S., and Mogul, J. Path MTU Discovery for IP version 6. RFC 1981, Internet Engineering Task Force, August 1996. 70. Jaeggli, J., Colitti, L., Kumari, W., Vyncke, E., Kaeo, M., and Taylor, T. Why Operators Filter Frag- ments and What It Implies. Internet-Draft draft-taylor-v6ops-fragdrop-00, Internet Engineering Task Force, October 2012. Work in progress. 71. deBoer, M. and Bosma, J. Discovering Path MTU black holes on the Internet using RIPE Atlas. Masters thesis, University of Amsterdam, MSc. Systems & Network Engineering, July 2012. 72. Mathis, M. and Heffner, J. Packetization Layer Path MTU Discovery. RFC 4821, Internet Engineering Task Force, March 2007. 73. Kent, S. and Seo, K. Security Architecture for the Internet Protocol. RFC 4301, Internet Engineering Task Force, December 2005. 74. 3GPP. 3G security; Network Domain Security (NDS); IP network layer security. TS 33.210, 3rd Generation Partnership Project (3GPP), June 2010. 75. Frankel, S., Glenn, R., and Kelly, S. The AES-CBC Cipher Algorithm and Its Use with IPsec. RFC 3602, Internet Engineering Task Force, September 2003. 76. Krawczyk, H., Bellare, M., and Canetti, R. HMAC: Keyed-Hashing for Message Authentication. RFC 2104, Internet Engineering Task Force, February 1997. 77. Kent, S. IP Encapsulating Security Payload (ESP). RFC 4303, Internet Engineering Task Force, December 2005. 78. 3GPP. Policy and Charging Control (PCC) over Gx/Sd reference point. TS 29.212, 3rd Generation Part- nership Project (3GPP), March 2012. 79. 3GPP. Policy and charging control signalling flows and Quality of Service (QoS) parameter mapping. TS 29.213, 3rd Generation Partnership Project (3GPP), December 2011. 80. 3GPP. Policy and charging control over Rx reference point. TS 29.21