The Apple Software Update application, which may be found in
C:\Program Files (x86)\Apple Software Updateon Microsoft Windows systems, is used to check for updates for Apple software products on those systems. While checking for updates, the software establishes HTTP connections to
swcatalog.apple.com. You may find that a web server it is querying regarding updates, though, is in the IP address space of the Internet Service Provider (ISP) for the system on which the software runs because Apple has partnered with Akamai Technologies as have many other large companies, for use of Akamai's content delivery network (CDN) for the delivery of content from Apple. By partnering with a CDN provider a company can have its content delivered from servers closer to the end user.
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