To which I would add . . .
The last I heard, the .COM TLD was being resolved
by some of the *root servers*! If we add this to
the table below, it would look like this:
+----------------------+----------+-------+--------+---------+
| ccTLD/gTLD | TLD | 2LD | 3LD | Hosts |
+----------------------+----------+-------+--------+---------+
| JAPAN | JP | 97 | 38979 | 1718935 |
| UNITED STATES | US | 75 | 3118 | 1642418 |
| CANADA | CA | 5048 | 259457 | 1584273 |
| GERMANY | DE | 77016 | 398631 | 1375114 |
| COM | 3000000+ | ?? | ??? | ???? |
+----------------------+----------+-------+--------+---------+
In other words, if we ignore caching effects, the root zone
could easily accomodate millions of TLDs. (Caching effects
are important, and I'm not suggesting that they be ignored)
Jay.
At 2/19/99, 01:17 PM, Dr Eberhard W Lisse wrote:
>In message <[EMAIL PROTECTED]>, Greg Skinner writes:
>
>> The reason I am asking is because once we get to the level of hundreds
>> of thousands of TLDs, we risk the DNS performance problems that have
>> been discussed earlier. That would have an effect on the entire
>> Internet. So it seems at the very least, we need to proceed slowly in
>> adding TLDs, so we can study its effect on DNS performance and make
>> changes to it if necessary to allow it to scale.
>
>>From the domainwalk data:
>
> +----------------------+------+-------+--------+---------+
> | Country | TLD | 2LD | 3LD | Hosts |
> +----------------------+------+-------+--------+---------+
> | JAPAN | JP | 97 | 38979 | 1718935 |
> | UNITED STATES | US | 75 | 3118 | 1642418 |
> | CANADA | CA | 5048 | 259457 | 1584273 |
> | GERMANY | DE | 77016 | 398631 | 1375114 |
> +----------------------+------+-------+--------+---------+
>
>Whether you do it on 2LD, 3LD or even 4LD level, it seems to work, so
>why not on TLD level? It's mainly a matter of horse power, I'm quite
>sure BIND is capable.
>
>But, if one restricts applications to groups of applicants rather then
>allowing individual applicants, one would avoid excessive
>proliferation.
>
>
>el
>
