ICMP Address Mask Request
From Wikipedia, the free encyclopedia
Address Mask Request is an ICMP query message, normally sent by a host to a router in order to obtain an appropriate subnet mask.
Message Format:
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| Type = 17 | Code = 0 | Header Checksum |
|
Identifier |
Sequence Number |
|
Address Mask |
- Type must be set to 17.
- Code must be set to 0.
- The Address Mask can be set to 0.
Recipients should reply to this message with an Address Mask Reply message.
