1329RE: [webanalytics] Does Broadband = unique permanent IP address?
- Jan 31, 2005Hi David,
The major residential broadband ISPs, both cable and DSL primarily use
dynamic IP address allocation. It makes for more flexible network
management, generally lower support costs (they don't have to coach
their customers on setting or re-setting DNS configuration) and means
users are less likely to run servers (web, mail, game, etc.) on their
residential plans rather than on higher priced business service plans.
While the leases on the IP addresses may be fairly long lived--days or
even weeks--they are still dynamically allocated and subject to change.
The situation is much better than with dial up where IP addresses only
last the length of the session, but an IP address is still not a great
long term unique identifier.
I think that the biggest benefit of the migration to broadband from a
web analytics perspective is improved geo-location. The major
geo-location databases from Quova, Akamai, Digital Envoy (etc.), can
resolve the location of broadband IP addresses with excellent accuracy.
Regional Manager - Northwest
> -----Original Message-----
> From: David Culbertson [mailto:davidsculbertson@...]
> Sent: Monday, January 31, 2005 6:13 PM
> To: email@example.com
> Subject: [webanalytics] Does Broadband = unique permanent IP address?
> Hey Folks,
> The arguments against ip address as the unique identifier for
> visits are well known. One of the major reasons is that
> dial-up ISPs (particularly AOL) use dynamic IPs, so the same
> person could (probably
> will) have a different IP address each visit to a website.
> As broadband becomes increasingly popular (national household
> penetration now over 50%), does this make IP address a worthy
> identifier again? As a long-time cable broadband user, I know
> that the cable companies usually assign permanent IP
> addresses. I don't know about DSL broadband or wireless (WI FI).
> Any thoughts out there?
> David S. Culbertson
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