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"Charles Christacopoulos" writes:
| I am curious. What are the advantages of cacheing the servers of other
| Universities.
Hi Charles - here are a couple of things which impact heavily on this:
1) firewalling and use of private netblocks to reduce unexpected (and/
or chargeable) traffic - e.g. putting students on a private IP
address range to make it harder for them to use Napster et al
2) some proxy cache servers have little or no control over which URLs
are sent 'upstream' to parent caches like the JANET Web Cache Service,
in which case the site may inadvertantly end up using us to request
material from other ac.uk sites, which would probably be best fetched
directly rather than through a third party
In the former case, you'll be seeing requests from the site cache
directly, whereas in the latter you'll be seeing them stamped with the
domain name <machine>.wwwcache.ja.net, where <machine> is one of some
40-odd cache servers. FWIW the JANET caches are on the IP address
ranges 194.83.240.0/24 and 194.82.103.0/24, i.e. all of the addresses
starting 194.83.240 or 194.82.103 are our machines.
Cheers,
Martin
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