DHCPDECLINE
E207720
DHCPDECLINE is a Dynamic Host Configuration Protocol (DHCP) message sent by a client to inform the server that the offered IP address is already in use or otherwise invalid.
All labels observed (1)
| Label | Occurrences |
|---|---|
| DHCPDECLINE canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T1866757 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: DHCPDECLINE Context triple: [RFC 2131, definesMessageType, DHCPDECLINE]
-
A.
DHCP
DHCP (Dynamic Host Configuration Protocol) is a network management protocol that automatically assigns IP addresses and other configuration parameters to devices on an IP network.
-
B.
BOOTP
BOOTP (Bootstrap Protocol) is an older network protocol used to automatically assign IP addresses and boot configuration to diskless or thin-client machines over a network.
-
C.
RFC 2132
RFC 2132 is an Internet Engineering Task Force (IETF) standard that specifies the DHCP options and BOOTP vendor extensions used for configuring network clients.
-
D.
ARP
ARP (Address Resolution Protocol) is a network protocol used to map IP addresses to their corresponding MAC (hardware) addresses within a local network.
-
E.
Denial
Denial is a 2016 historical drama film starring Timothy Spall that dramatizes the legal battle between historian Deborah Lipstadt and Holocaust denier David Irving.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: DHCPDECLINE Target entity description: DHCPDECLINE is a Dynamic Host Configuration Protocol (DHCP) message sent by a client to inform the server that the offered IP address is already in use or otherwise invalid.
-
A.
DHCP
DHCP (Dynamic Host Configuration Protocol) is a network management protocol that automatically assigns IP addresses and other configuration parameters to devices on an IP network.
-
B.
BOOTP
BOOTP (Bootstrap Protocol) is an older network protocol used to automatically assign IP addresses and boot configuration to diskless or thin-client machines over a network.
-
C.
RFC 2132
RFC 2132 is an Internet Engineering Task Force (IETF) standard that specifies the DHCP options and BOOTP vendor extensions used for configuring network clients.
-
D.
ARP
ARP (Address Resolution Protocol) is a network protocol used to map IP addresses to their corresponding MAC (hardware) addresses within a local network.
-
E.
Denial
Denial is a 2016 historical drama film starring Timothy Spall that dramatizes the legal battle between historian Deborah Lipstadt and Holocaust denier David Irving.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
DHCP control message
ⓘ
DHCP message type ⓘ |
| category | network management protocol message ⓘ |
| causes |
server to add the declined IP address to a bad-address list
ⓘ
server to mark the declined IP address as unusable ⓘ |
| definedIn | RFC 2131 ⓘ |
| direction | client-to-server ⓘ |
| followsMessageType | DHCPOFFER ⓘ |
| hasField |
chaddr
ⓘ
ciaddr ⓘ flags ⓘ giaddr ⓘ hlen ⓘ hops ⓘ htype ⓘ op ⓘ options ⓘ secs ⓘ siaddr ⓘ xid ⓘ yiaddr ⓘ |
| hasNumericTypeCode | 4 ⓘ |
| hasPurpose |
to inform the server that an offered IP address is already in use
ⓘ
to inform the server that an offered IP address is invalid ⓘ |
| includesOption |
DHCP Message Type option
ⓘ
Requested IP Address option ⓘ Server Identifier option ⓘ |
| layer | application layer in the TCP/IP model ⓘ |
| mayFollowMessageType | DHCPACK ⓘ |
| notUsedIn | stateless DHCPv6 ⓘ |
| partOf |
DHCP
ⓘ
surface form:
Dynamic Host Configuration Protocol
|
| relatedTo |
DHCPACK
ⓘ
DHCPDISCOVER ⓘ DHCPINFORM ⓘ DHCPNAK ⓘ DHCPOFFER ⓘ DHCPRELEASE ⓘ DHCPREQUEST ⓘ |
| sentAfter | client performs ARP-based duplicate address detection ⓘ |
| sentTo | DHCP server ⓘ |
| transportProtocol | UDP ⓘ |
| triggeredBy |
duplicate IP address detection
ⓘ
failed address conflict detection ⓘ |
| usedBy | DHCP client ⓘ |
| usedFor | maintaining IP address uniqueness on a network ⓘ |
| usedIn | IPv4 DHCP ⓘ |
| usesPort |
67 on server side
ⓘ
68 on client side ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: DHCPDECLINE Description of subject: DHCPDECLINE is a Dynamic Host Configuration Protocol (DHCP) message sent by a client to inform the server that the offered IP address is already in use or otherwise invalid.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.