Part of HSCN domain naming standards and policies
Hierarchy
DNS names are arranged in a hierarchy of levels. Levels are delimited by “.” and counted from the right. Using the DNS names 'accessrequest.beta.genomics.nhs.uk' and 'relay.nhs.uk' as examples:
| Level 5 | Level 4 | Level 3 | Level 2 | Level 1 |
|
accessrequest |
beta | genomics rel | nhs | uk |
| - | - | relay | nhs | uk |
When referring to these levels within the HSCN DNS Service:
- level 2 and 1 is the apex domain (meaning nhs.uk, nhs.net)
- level 3 is a sub-domain or resource record in the apex domain if appropriate
- level 4 is a sub-domain or resource record in a sub-domain as appropriate
- the bottom level (in our examples 'accessrequest' and 'relay') are always simply resource records
Last edited: 12 June 2024 11:23 am