Defining MTU

nycbpnycbp Posts: 21Member ■□□□□□□□□□
Can anyone help me to properly define what an MTU is? I understand that the acronym is maximum transmission unit? From what I understood, this is largest packet size in bytes that an interface can handle.


  • MosGuyMosGuy Posts: 195Member
    You are correct. A formal definition would be something like: "The maximum transmission unit (MTU) is the largest packet size, measured in bytes, that can be transmitted over a network". Any messages larger than the MTU are divided into smaller packets before being sent. Breaking them up slows transmission speed. In an ideal situation, the MTU should be the same as the smallest MTU of all the networks between the local computer and a message's final destination. MTU value's differ depending on the type of link. Ethernet is normally 1500 bytes, whereas PPP is usually between 500-2000 bytes
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