public enum EDnsOptionTypePublic Enumeration EDnsOptionTypepublic enum class EDnsOptionTypetype EDnsOptionType| LongLivedQuery | 1 | Update Lease Defined in draft-sekar-dns-llq. |
| UpdateLease | 2 | Update Lease Defined in draft-sekar-dns-ul. |
| NsId | 3 | Name server ID Defined in RFC 5001. |
| Owner | 4 | Owner Defined in draft-cheshire-edns0-owner-option. |
| DnssecAlgorithmUnderstood | 5 | DNSSEC Algorithm Understood Defined in RFC 6975. |
| DsHashUnderstood | 6 | DS Hash Understood Defined in RFC 6975. |
| Nsec3HashUnderstood | 7 | NSEC3 Hash Understood Defined in RFC 6975. |
| ClientSubnet | 8 | Client Subnet Defined in RFC 7871. |
| Expire | 9 | Expire EDNS Option Defined in RFC 7314. |
| Cookie | 10 | Cookie Option Defined in RFC 7873. |
| TcpKeepAlive | 11 | edns-tcp-keepalive EDNS0 Option Defined in RFC 7828. |
| Padding | 12 | The EDNS(0) Padding Option Defined in RFC 7830. |