Domain Survey Notes
- There is no way to determine how many users are on the net,
besides making guesses and estimates.
- Note there is not necessarily any correlation between a hosts
domain name and where it is actually located. A host with a .NL
domain name could easily be located in the U.S. or any other country.
In addition, hosts under domains EDU/ORG/NET/COM/INT could be located
anywhere. There is no way to determine where a host is without
asking its administrator.
- There is not necessarily any correlation between a network number
and a domain name. A single network number could span many countries,
and a single domain may have hosts on multiple network numbers.
- A host used to be a single machine on the net. However, the
definitions of a host has changed in recent years due to virtual
hosting, where a single machine acts like multiple systems (and has
multiple domain names and IP addresses). Ideally, a virtual host will
act and look exactly like a regular host, so we count them equally.
- We consider the numbers presented in the domain survey to be
fairly good estimates of the minimum size of the Internet.
We can not tell if there are hosts or domains we could not locate.
- In summary, it is not possible to determine the exact size of
the Internet, where hosts are located, or how many users there are.