What is the approximate size of each frame of data that travels in Ethernet network?

Question

BlackTom AI · Accepted Answer

Ethernet frames have a maximum payload of 1500 bytes (the common MTU), which is approximately 1.5 KB, so the correct choice is b. 1.5 KB.

1) Relevant knowledge points and concepts
- Ethernet II frame structure includes: Destination MAC (6 bytes), Source MAC (6 bytes), EtherType (2 bytes), Payload (46–1500 bytes), Frame Check Sequence (FCS, 4 bytes). With no VLAN tag, the full maximum frame on the wire is 1518 bytes (header + payload + FCS). The key number for "size of each frame of data" is the payload (MTU) of 1500 bytes, commonly cited as 1.5 KB.
- Minimum frame size is 64 bytes (including header and FCS). Jumbo frames (nonstandard) can be larger (e.g., ~9000 bytes), but standard Ethernet uses 1500-byte payload.

2) Step-by-step reasoning
- Standard maximum payload (data) = 1500 bytes.
- If question asks approximate size of "each frame of data" that travels, the conventional reference is the payload MTU of 1500 bytes.

3) Calculations (intermediate steps)
- Using decimal kilobytes: 1500 bytes ÷ 1000 = 1.5 KB.
- Using binary kilobytes: 1500 bytes ÷ 1024 ≈ 1.4648 KiB ≈ 1.46 KiB (often rounded to 1.5 KB in networking contexts).

4) Why the correct answer is correct
- The standard Ethernet MTU/payload is 1500 bytes, commonly expressed as ~1.5 KB. That is the widely quoted approximate size for a typical Ethernet data frame payload.

5) Why other options are incorrect
- a. 1 KB (≈1024 bytes) is smaller than the standard 1500-byte payload, so not the typical Ethernet frame size.
- c. 2.5 KB (≈2560 bytes) exceeds the standard MTU; only jumbo frames reach larger sizes and they are nonstandard.
- d. 2 KB (≈2048 bytes) is also larger than the standard 1500-byte payload and not the usual Ethernet frame size.

6) Conclusion
- Therefore, the approximate size of each Ethernet data frame is 1.5 KB, matching the provided answer (b. 1.5 KB).

What is the approximate size of each frame of data that travels in Ethernet network?单项选择题

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