| IP option 1, No Operation |
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Description | Glossary | RFCs | Publications | Obsolete RFCs |
| Protocol suite: | TCP/IP. |
| Protocol type: | Connectionless network layer protocol. |
| Option length: | 1 byte. |
| Host implementation: | |
| Router implementation: | |
| Links: | IANA: IP option numbers. |
This option is typically used to align the beginning of the next option on a 32 bit boundary within the IP header.
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. Cleared to 0.
The option is not to be copied into all fragments.
Class. 2 bits. Cleared to 0.
This is a control option.Option. 5 bits. Set to 1.
The IP option number.
RFCs:
[RFC 791] Internet Protocol.
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Description | Glossary | RFCs | Publications | Obsolete RFCs |