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MTU is the largest packet of data that can be transmitted across a network, determined by network configuration and protocols. Packet size is important to avoid bottlenecks, but too large packets can cause router failure. MTUs have grown with technology, and ISPs advise on settings.
The maximum transmission unit, or MTU, is the largest single frame or packet of data that can be transmitted across a network. The exact nature of the maximum transmission unit will be determined by the configuration of the network and the type of protocols in place for data transmission. Generally, a maximum transmission unit consists of eight-bit information bytes.
The size of the frame or packet is very important to the process of data transmission through any network. For this reason, there are usually specific rules governing the size of data packets that can be transmitted without creating some sort of bottleneck within the network. In the case of the Internet, a set of standards called the Transmission Control Protocol is used to define what constitutes a functional data packet size.
When transmitting information, the size of the maximum transmission unit is very important. In the event that the packet or frame is too large, the end result could be a router unable to process the packet properly and data transmission will fail, or the router will make a series of continuous attempts to process the packet . This can lead to the failure of the router to handle other broadcasts.
At the same time, if the maximum transmission unit is quite small, this leaves more room for headers and other types of overhead that can be processed as part of the data packet. This can also mean more that you need to send and process even more acknowledgments. While a smaller package is less likely to cause a bottleneck, it does leave room for wasted resources.
MTUs have been around for several years. As technology has continued to advance, the desirable size of a given maximum drive unit has grown accordingly. Operating systems located on hard drives are usually preset with an MTU range that conforms to the most common applications. Typically, the setting reflects a general range, as the standard for one type of network may be high or low for another network. Internet Service Providers also tend to advise on settings for MTU reception, based on the type of connectivity present and the operating system used by the end user.
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