TCP/IP Stack: The TcpIp module contains all protocols for UDP and TCP-based communication. It supports the versions IPv4 and Ipv6 as well as parallel operation of Ipv4 and Ipv6 in one ECU. It contains the following protocols: – Ipv4, ICMPv4 and ARP – Ipv6, ICMPv6 and NDP – UDP, TCP, DHCPv4 (client) and DHCPv6 (client) – Tls (since AUTOSAR 4.4) – IPsec including IKE (since AUTOSAR R19-11 (4.5))