| IP option 1, No Operation |
Description:
This option may be used between IP options. For example, to align the beginning of a subsequent option on a 32 bit boundary.
May be copied, introduced, or deleted on fragmentation, or for any other reason.
| MAC header | IP header | IP option 1 | Data |
IP option 1:
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
|---|---|---|---|---|---|---|---|
| Type | |||||||
Type. 8 bits. Set to 1.
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
|---|---|---|---|---|---|---|---|
| C | Class | Option | |||||
C, Copy flag. 1 bit. Set to 0.
The option is not to be copied into all fragments.
Class. 2 bits. Set to 0.
This is a control option.Option. 5 bits. Set to 1.
The IP option number.
RFCs:
[RFC 791] INTERNET PROTOCOL DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION.