Unique IP Address for Everyone

Hi,

Everyone on the web has a unique IP address. What
method is used to produce a unique IP address for everyone
using the web, which insures that a duplicate doesn't occur?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active key logger (spyware) in your PC.

Same method that assures that a 5+4 Zip Code in the United States only
refers to a single destination, or that a telephone number only refers
to a single end line. In all of these cases, the methodology is
hierarchical--initial numbers refer to major nodes, and the address
becomes more and more specific as you work towards the end. As for
duplications, well, for every IP/ZipCode/Telco number issued, there's
always a list somewhere that keeps track. First order of business in
assigning such addresses is to build one based upon hierarchy, and to
then see if that address is already used--if so, the nearest available
address is substituted.

--
Gary S. Terhune
MS MVP Shell/User
http://www.grystmill.com/articles/cleanboot.htm
http://www.grystmill.com/articles/security.htm

"Brad" wrote in message
...
Hi,

Everyone on the web has a unique IP address. What
method is used to produce a unique IP address for everyone
using the web, which insures that a duplicate doesn't occur?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active key logger (spyware) in your PC.

IP addresses was allocated on geographical basis long ago.
Within each geographical location (like USA), IP addresses was assigned
(purchased) by various organization and each of these organizations allocate
IP addresses to their customers.

In the past an individual who wanted to set up a network and needed a block
of IP addresses could actually apply and get one assigned. With the growth
of the internet blocks of IP addresses was only assigned to major providers.

Thus, when an individual connect to the Internet, a IP address is assigned
by the service provider. This IP address is unique and is temporary. If
connected thru a broadband connection typically a lease for a fixed period
of time is provided and renewed regularly. Thus as long as connected (or if
disconnected for a short period of time) this address will remain fixed. If
connecting thru a phone line for short duration, an address is provided but
once the connection is interrupted the address is returned to the service
providers pool of available IP addresses. A subsequent connection will most
likely result in another IP address.

Three blocks of IP addresses was reserved for use on Internal networks.
These addresses are not routable on the internet. However, they can be used
by anyone on an internal network. To connect to the internet from such a
network a router ( or equivalent is required.). This interface will have a
routable assigned IP address on the internet side and use the reserved
addresses on the local side. The router will then allow each computer on the
local side to interface with the internet by translating between the
internal reserved IP addresses (network) and the external network.

10.0.0.0 to 10.255.255.255

172.16.0.0 to 172.31.255.255

192.168.0.0 to 192.168.255.255






--
Jon Hildrum
DTS MVP

www.hildrum.com
"Brad" wrote in message
...
Hi,

Everyone on the web has a unique IP address. What
method is used to produce a unique IP address for everyone
using the web, which insures that a duplicate doesn't occur?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active key logger (spyware) in your PC.

(Brad) wrote:

Hi,

Everyone on the web has a unique IP address. What
method is used to produce a unique IP address for everyone
using the web, which insures that a duplicate doesn't occur?

They are assigned by the Internet Assigned Numbers Authority
(www.iana.org). Look at this page:
http://www.iana.org/ipaddress/ip-addresses.htm it talks about how IP
addresses are assigned.

--
Tim Slattery
MS MVP(DTS)