title: What is the total length of pure TCP Ack sent over ethernet?
body: <p>I have captured a pure TCP ack using Microsoft Network Monitor. It shows the captured frame length as 54 bytes. IP header (20 bytes) + TCP Header (20 bytes) + Src MAC (6 bytes) + Dst MAC (6 bytes)  + Frame Type (2 bytes). I don't see a CRC (4 byte) field. I know the minimum frame length for Ethernet is 64 bytes (46 + 18) and the maximum is 1518. Why don't I see this in Network Monitor? The value of the data field for Ethernet frame is 46-1500. Is the IP dataframe padded with zeros in 6 octets to make the total frame length 46?</p>
  
  <p><strong>Found Answer: The minimum length of the data field of a packet sent over an
     Ethernet is 46 octets.  If necessary, the data field should be padded
     (with octets of zero) to meet the Ethernet minimum frame size.  This
     padding is not part of the IP packet and is not included in the total
     length field of the IP header. <a href="http://www.ietf.org/rfc/rfc0894.txt" rel="nofollow">http://www.ietf.org/rfc/rfc0894.txt</a></strong></p>
  
  <p>What is minimum overhead for a frame in IEEE 802.11. What is the maximum and minimum frame size there? What will be the frame size of a pure TCP Ack over WiFi?</p>
  
  <p><strong>I will also accept partial answers</strong></p>