What is the maximum transmission unit (MTU) size for standard Ethernet?

  1. 576 bytes
  2. 2048 bytes
  3. 1024 bytes
  4. 1500 bytes ✓

Correct answer: 1500 bytes

Option D is correct because the IEEE 802.3 standard defines the maximum transmission unit for standard Ethernet frames as 1500 bytes of payload, a value that has remained the baseline since 10 Mbps Ethernet and is supported across virtually all network equipment. Option A, 576 bytes, is the minimum MTU required by IPv4 for all routers to forward without fragmentation, not the Ethernet frame MTU. Option B, 2048 bytes, is not a standard Ethernet MTU value and does not correspond to any common Ethernet specification. Option C, 1024 bytes, is also not a defined Ethernet MTU and appears to be a plausible-sounding but incorrect distractor.

Topic: · mtu, ethernet, network fundamentals, comptia network+

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