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In computer networking, the maximum transmission unit (MTU) is the size of the largest protocol data unit (PDU) that can be communicated in a single network layer transaction. [1]: 25 The MTU relates to, but is not identical to the maximum frame size that can be transported on the data link layer, e.g., Ethernet frame.
The process is repeated until the MTU is small enough to traverse the entire path without fragmentation. As IPv6 routers do not fragment packets, there is no Don't Fragment option in the IPv6 header. For IPv6, Path MTU Discovery works by initially assuming the path MTU is the same as the MTU on the link layer interface where the traffic originates.
The TCP should ask the IP for the Maximum Datagram Data Size (MDDS). This is the MTU minus the IP header length (MDDS = MTU − IPHdrLen). When opening a connection, TCP can send an MSS option with the value equal to: MDDS − TCPHdrLen. In other words, the MSS value to send is: MSS = MTU − TCPHdrLen − IPHdrLen
An example of the fragmentation of a protocol data unit in a given layer into smaller fragments. IP fragmentation is an Internet Protocol (IP) process that breaks packets into smaller pieces (fragments), so that the resulting pieces can pass through a link with a smaller maximum transmission unit (MTU) than the original packet size.
A minimum MTU of 1,280 octets is mandated by IPv6, but hosts are "strongly recommended" to use Path MTU Discovery to take advantage of MTUs greater than the minimum. [ 1 ] Since July 2017, the Internet Assigned Numbers Authority (IANA) has been responsible for registering all IPv6 parameters that are used in IPv6 packet headers.
2001: MTU Motoren- und Turbinen-Union Friedrichshafen GmbH is renamed MTU Friedrichshafen GmbH. 2005 : In late 2005, the DaimlerChrysler Off-Highway business unit, including MTU Friedrichshafen and the Off-Highway division of Detroit Diesel Corporation , is sold to the Swedish financial investor EQT AB .
The EuroPowerPack is the combination of the MTU MT883 Ka-500/501 diesel engine delivering over 1100 kW (1500 PS) shaft power with the ten-speed (five forward, five reverse) Renk HSWL 295TM automatic transmission for the use in heavy tracked vehicles like tanks.
Load balancing by per-packet multipath routing was generally disfavored due to the impact of rapidly changing latency, packet reordering and maximum transmission unit (MTU) differences within a network flow, which could disrupt the operation of many Internet protocols, most notably TCP and path MTU discovery.