| BOOTP / DHCP option 40, Network Information Service Domain | 
| 
 | 
Description | Glossary | RFCs | Publications | Obsolete RFCs | 
| Protocol suite: | TCP/IP. | 
| Protocol type: | Application layer configuration protocol. | 
| Option length: | 3+ bytes. | 
| Links: | IANA: BOOTP and DHCP options. | 
This option specifies the name of the client's NIS domain.
| MAC header | IP header | UDP header | BOOTP | DHCP header | BOOTP / DHCP option 40 | 
BOOTP / DHCP option 40:
| 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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Code | Length | Domain ::: | |||||||||||||||||||||||||||||
Code.
8 bits.
Always set to 40.
Option code.
Length.
8 bits.
1+.
Size of the option data in bytes.
Domain.
Variable length.
The domain is formatted as a character string consisting of characters from the
NVT ASCII character set.
RFCs:
[RFC 2132] DHCP Options and BOOTP Vendor Extensions.
[RFC 1533] DHCP Options and BOOTP Vendor Extensions.
| 
 | 
Description | Glossary | RFCs | Publications | Obsolete RFCs |