To ensure Apple devices can access APNs and other Apple services (e.g., App Store, iCloud), network configurations must allow outbound traffic to Apple’s network, specifically the 17.0.0.0/8 IP block on TCP port 5223 (with 443 as a fallback). This requires adjusting firewalls or web proxies to permit this traffic, as many organizational networks restrict outbound connections. VPN access (option A) is unnecessary and impractical for all devices. SSO payloads (option B) manage authentication, not network access to Apple services. Bonjour (option D) is for local device discovery, not APNs connectivity. TheApple Platform Deployment Guideprovides these networkrequirements.
[Reference:Apple Platform Deployment Guide(Chapter: Network Requirements for Apple Services)., ]
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