# Internet

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Building a server into your app \<building_a_server_into_your_app\> HTTP (web) communication \<[http]()(web)\_communication\> Internet communications \<internet_communications\> Communicating via TCP/IP \<communicating_via_tcp-ip\> Communicating via UDP \<communicating_via_udp\> Accessing web services \<accessing_web_services\> Using non-secure URLs on macOS and iOS \<using_non-secure_urls_on_macos_and_ios\> Sending email From your app \<sending_email_from_your_app\> Testing a web service \<testing_a_web_service\>

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