Apple Resources - Network Tools
http://edu-observatory.org/olli/Apple_Resources/Network.html



Network Analysis Tools 
  http://edu-observatory.org/olli/HCS/tools.html   
Connectivity (Internet) 
  http://edu-observatory.org/olli/Manage/Connectivity.html   
WiFi Connectivity 
  http://edu-observatory.org/olli/Manage/WiFi_Connectivity.html   

Creating and Maintaining Home Networks 
  http://edu-observatory.org/olli/Networks/index.html   
Network Quality (Apple)
  https://tidbits.com/2022/04/22/use-apples-networkquality-tool-to-test-internet-responsiveness/   





DNS - Public DNS service operators https://en.m.wikipedia.org/wiki/Public_recursive_name_server#List_of_public_DNS_service_operators https://1.1.1.1 https://www.dnsperf.com/#!dns-resolvers A public Domain Name Server (DNS) is a name server that may be used in place of, or in addition to, name servers provided by your local Internet Service Provider (ISP). Public name servers offer reliability, security, speed and privacy. Several services now support secure DNS lookup transport services such as DNS over TLS and DNS over HTTPS. TCP and UDP ports used by Apple software products https://support.apple.com/en-us/HT202944 https://support.apple.com/en-us/HT210060 sam.wormley@gmail.com