net Engineering Steering Group Internet Engineering Task Force IP Flow Mobility and Seamless WLAN Offload Internet Gateway Device Internet Governance Forum Interior Gateway Protocol Interface IDentifier IKEv2 Internet Key Exchange version 2 International Mobile Equipment Identity IP Multimedia Subsystem International Mobile Subscriber Identity Internet of Things Internet Protocol Internet Protocol Control Protocol IP in IP tunneling IPsec Internet Protocol security Acronyms xxvii Internet Protocol Television Internet Protocol version 4 Internet Protocol version 6 IPV6CP IPv6 Control Protocol IP Packet eXchange - evolved GRX IS-IS Intermediate System to Intermediate System ISATAP Intra-Site Automatic Tunnel Addressing Protocol Internet Systems Consortium Internet Service Provider Layer 2 Tunneling Protocol L2TPv3 Layer 2 Tunneling Protocol version 3 L2TP Access Concentrator LACNIC Latin America and Caribbean Network Information Center Local Area Network Link Control Protocol Legal Interception Local IP Access Local Internet Registry Logical Link Control Local Mobility Anchor L2TP Network Server Long Term Evolution Machine-to-Machine Media Access Control Mobile Access Gateway MANET Mobile Ad hoc NETworking Mapping of Address and Port with Encapsulation or Translation Multimedia Broadcast Multicast Service Mobile Equipment Management Information Base MIPv6 Mobile IPv6 Multicast Listener Discovery MLDv2 Multicast Listener Discovery version 2 Mobile Management Entity Multimedia Messaging Mobile Node MP-BGP Multi-Protocol Border Gateway Protocol MultiProtocol Label Switching Mobile Station Mobile Switching Centre MSISDN Mobile Station International Subscriber Directory Number Maximum Segment Size Mobile Terminal Machine-Type Communications Maximum Transmission Unit xxviii Acronyms NAPDEF Network Access Point Definition Non-Access Stratum Network Address Translation NAT-PMP NAT Port Mapping Protocol NAT-PT Network Address Translation - Protocol Translation NAT44 Network Address Translation from IPv4 to IPv4 NAT46 Networ