4 ms·

Thankfully it exists and seems to be about one of the only sources in identifying 2nd and lower level TLDs. I remember reading how browsers were accepting cook

Thankfully it exists and seems to be about one of the only sources in identifying 2nd and lower level TLDs. I remember reading how browsers were accepting cookies that'd be sent to many other sites on the same host level because the browsers had no idea on what authority level to differentiate.

JdeBP 6y ago
"2nd level top-level domain"? (-:
- ricardo81 6y ago
  Hehe, in my travels I haven't found a good moniker for them, as many people would call "co.uk" a TLD. Maybe the T can stand for "toppish".
  - ZWoz 6y ago
    https://en.wikipedia.org/wiki/Top-level_domain https://en.wikipedia.org/wiki/Top-level_domain - TLD is first level[1]. Domain directly on root. Domains like co.uk and so on are second level domains. ----- [1] - or second, then again counting root as level 0 seems reasonable.
    - ricardo81 6y ago
      Yes, apparently "SLD" is quite a common term but it does not encapsulate the likes of 'pvt.k12.ma.us' or 'uk.com' (in the sense that it's not a registry per se for the latter) So there's an awkward way of defining things in various contexts, like cookie permissions, whether a domain is registerable, whether it is a registry the next level up
      - ZWoz 6y ago
        uk.com is second level, pvt.k12.ma.us fourth. I think you really look words for denoting political separation (instead technical), but I don't know any good terminology for that. Public suffix is probably best term to differentiate between "shared" and "dedicated" namespace. Technically though, root servers have information only about TLD-s. co.uk may be special for some people, but a.root-servers.net. don't care, it's still sends you to uk TLD nameservers, like for every other second level domain. That political separation or what counts as "registry" is itself very tricky. Are dynamic DNS services registries? How about hosting (like blog) service provider, who gives subdomain/hostname for every client?
        ricardo81 6y ago
        Well, exactly. Canonically they're often referred to as TLDs in the context of "this trusted authority delegates sub-level hosts" but it means something different to many clients. As the original comment suggested it's a bit of a non sequitur to call anything below the initial host label to be a TLD. I was just suggesting there isn't a generally accepted moniker for what they're called. The public suffix list makes some kind of definition, mainly for cookie-level permissions.
- ficklepickle 6y ago
  3rd and 4th level domains exist, too. https://en.wikipedia.org/wiki/.ca#Third-level_(provincial)_and_fourth-level_(municipal)_domains https://en.wikipedia.org/wiki/.ca#Third-level_(provincial)_a...

JdeBP 6y ago

"2nd level top-level domain"? (-:

ricardo81 6y ago
Hehe, in my travels I haven't found a good moniker for them, as many people would call "co.uk" a TLD. Maybe the T can stand for "toppish".
- ZWoz 6y ago
  https://en.wikipedia.org/wiki/Top-level_domain https://en.wikipedia.org/wiki/Top-level_domain - TLD is first level[1]. Domain directly on root. Domains like co.uk and so on are second level domains. ----- [1] - or second, then again counting root as level 0 seems reasonable.
  - ricardo81 6y ago
    Yes, apparently "SLD" is quite a common term but it does not encapsulate the likes of 'pvt.k12.ma.us' or 'uk.com' (in the sense that it's not a registry per se for the latter) So there's an awkward way of defining things in various contexts, like cookie permissions, whether a domain is registerable, whether it is a registry the next level up
    - ZWoz 6y ago
      uk.com is second level, pvt.k12.ma.us fourth. I think you really look words for denoting political separation (instead technical), but I don't know any good terminology for that. Public suffix is probably best term to differentiate between "shared" and "dedicated" namespace. Technically though, root servers have information only about TLD-s. co.uk may be special for some people, but a.root-servers.net. don't care, it's still sends you to uk TLD nameservers, like for every other second level domain. That political separation or what counts as "registry" is itself very tricky. Are dynamic DNS services registries? How about hosting (like blog) service provider, who gives subdomain/hostname for every client?
      - ricardo81 6y ago
        Well, exactly. Canonically they're often referred to as TLDs in the context of "this trusted authority delegates sub-level hosts" but it means something different to many clients. As the original comment suggested it's a bit of a non sequitur to call anything below the initial host label to be a TLD. I was just suggesting there isn't a generally accepted moniker for what they're called. The public suffix list makes some kind of definition, mainly for cookie-level permissions.
ficklepickle 6y ago
3rd and 4th level domains exist, too. https://en.wikipedia.org/wiki/.ca#Third-level_(provincial)_and_fourth-level_(municipal)_domains https://en.wikipedia.org/wiki/.ca#Third-level_(provincial)_a...