See wikipedia for details.
WiFi and other transmission facilities will vary in frame fields and
lengths,
but still use the OUI and NIC tagging.
See : https://en.wikipedia.org/wiki/IEEE_802 for list other protocols.
1500 bytes max. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Preamble | Start of Frame delimiter |
Organizationally Unique Identifier
3 byte NIC - network, destination MAC@ of gateway system out of local sub-net |
802.1Q tag |
Ether-type or length |
|
Frame Check CRC |
Inter-frame Gap |
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7 octets | 1 octets | 6 octets / 6 octets | 4 octets | 2 octets | 65535 octets - Jumbo frame |
4 octets | 12 octets |
Protocol Version |
Type | Subtype | ToDS | FromDS | More Fragments flag |
Retry flag |
Power mgmt. |
More Data flag |
Protected Frame flag |
Duration ID |
Recevier MAC @ required |
Transmitter MAC @ optional |
Routing MAC @ |
Sequence Control |
Routing MAC @ |
|
Frame Check Sequence |
576 byte length valid on all hops | |||||||||||||||||||||||||||||||||||||
Version | IHL | DSCP | ENC | Total Length |
Identification | Flags | Fragment Offset |
Time To Live TTL | Protocol | Header Checksum |
Source IP @ | Destination IP @ | Options |
|
|||||||||||||||||||||||
Bits 0-3 | Bits 4-7 | Bits 8-13 |
Bits 14-15 | Bits 16-31 | Bits 32-47 |
Bits 48-50 | Bits 51-63 | Bits 64-71 |
Bits 72-79 | Bits 80-95 | Bits 96-127 |
Bits 128-159 | Bits 160-191 |
16-1484* Bytes | |||||||||||||||||||||||
Header 20-60 bytes | Data 0 - (65535-header) |
Version | Traffic Class | Flow Label |
Payload Length |
Next Header Additional Headers Stored in Payload |
Hop Limit |
Source IP @ | Destination IP @ |
|
|||||||
8-1460 bytes or Jumbo-gram |
Type | Code | Checksum | Rest of Header |
IP header and 1st 8-bytes of IP packet that triggered error |
8 bit | 8 bit | 16 bit | 32 bit | 0-x bytes |
Frame | ||||||||||||
Source Port | Destination Port |
Sequence Number | ACK number | Data Offset |
Reserved | Frame Flags | Window Size |
Checksum | Urgent Pointer | Options | Payload | |
Bits 0-15 | Bits 16-31 | Bits 32-63 |
Bits 64-31 | Bits 96-99 | Bits 100-102 |
Bits 103-111 | Bits 112-127 | Bits 128-143 |
Bits 144-159 | Bits 160-195 | 16-1468 Bytes |
Source Port | Destination Port |
Length | Checksum | Data |
16 bit | 16 bit | 16 bit | 16 bit | 0-65507 bytes |